SD Card is not initalizing but i dont know why!

Hey so i have no idea why my project wont even operate!! I am using an AJAX system for my webpage. The problem is my SD card wont actually initialize

My Code is as Follows:

/*--------------------------------------------------------------
  Description:  Arduino web server that displays 4 analog inputs,
                the state of 3 switches and controls 4 outputs,
                2 using checkboxes and 2 using buttons.
                The web page is stored on the micro SD card.

  Hardware:     Arduino Uno and official Arduino Ethernet
                shield. Should work with other Arduinos and
                compatible Ethernet shields.
                2Gb micro SD card formatted FAT16.
                Pins 2, 3 and 5 for the switches.
                RF Rx
                
                
--------------------------------------------------------------*/

#include <SPI.h>
#include <Ethernet.h>
#include <SD.h>
#include <VirtualWire.h>

// size of buffer used to capture HTTP requests
#define REQ_BUF_SZ   60

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; // MAC address from Ethernet shield sticker under board
IPAddress ip(192, 168, 1, 100); // IP address, may need to change depending on network
EthernetServer server(80);  // create a server at port 80
File webFile;               // the web page file on the SD card
char HTTP_req[REQ_BUF_SZ] = {0}; // buffered HTTP request stored as null terminated string
char req_index = 0;              // index into HTTP_req buffer

int LEDR = 6; //Pin 6
int LEDG = 9; //Pin 9
int LEDR1 = 8; //Pin 8
int LEDG1= 7; //Pin 7

void setup()
{
  // disable Ethernet chip 53 for MEGA

  pinMode(53, OUTPUT); //Pin 53
  digitalWrite(53, HIGH); //Pin 53
  
 // vw_set_ptt_inverted(true); // Required for DR3100
  vw_setup(2000);	 // Bits per sec
  vw_set_rx_pin(11);
  vw_rx_start();       // Start the receiver PLL running

  pinMode(LEDG, OUTPUT); //pin 9
  pinMode(LEDR, OUTPUT); //pin 6
  pinMode(LEDG1, OUTPUT); //pin 7
  pinMode(LEDR1, OUTPUT); //pin 8
  

  Serial.begin(9600);       // for debugging

  // initialize SD card
  Serial.println("Initializing SD card...");
  if (!SD.begin(4)) { // pin 4
  Serial.println("ERROR - SD card initialization failed!");
  return;    // init failed
  }
  Serial.println("SUCCESS - SD card initialized.");
  // check for index.htm file
  if (!SD.exists("HOME_AUTOMATION.htm")) {
    Serial.println("ERROR - Can't find index.htm file!");
    return;  // can't find index file
  }
  Serial.println("SUCCESS - Found index.htm file.");

  Ethernet.begin(mac, ip);  // initialize Ethernet device
  server.begin();           // start to listen for clients
}//End setup

void loop()
{
  digitalWrite(LEDG, LOW);
  digitalWrite(LEDR, LOW);
  digitalWrite(LEDG1, LOW);
  digitalWrite(LEDR1, LOW);

  uint8_t buf[VW_MAX_MESSAGE_LEN];
  uint8_t buflen = VW_MAX_MESSAGE_LEN;

  if (vw_get_message(buf, &buflen)) // Non-blocking
  {
    int i;

    digitalWrite(13, true); // Flash a light to show received good message
    // Message with a good checksum received, dump it.
    Serial.println("Got: ");

    for (i = 0; i < buflen; i++)
    {
      Serial.print(buf[i]);
      if (buf[i] == '1') {
        digitalWrite(LEDR, HIGH);
        digitalWrite(LEDG, LOW);
        

        delay(10000);
      }
      if (buf[i] == '0') {
        digitalWrite(LEDG, HIGH);
        digitalWrite(LEDR, LOW);
       

        delay(10000);
      }
      
      if (buf[i] == '2') {
        digitalWrite(LEDR1, HIGH);
        digitalWrite(LEDG1, LOW);
       

        delay(10000);
      }
      if (buf[i] == '3') {
        digitalWrite(LEDG1, HIGH);
        digitalWrite(LEDR1, LOW);
        

        delay(10000);
      }

      Serial.println("");
    }
    Serial.println("");
    digitalWrite(13, false);

  

  } 
  
  
  EthernetClient client = server.available();  // try to get client

  if (client) {  // got client?
    boolean currentLineIsBlank = true;
    while (client.connected()) {
      if (client.available()) {   // client data available to read
        char c = client.read(); // read 1 byte (character) from client
        // limit the size of the stored received HTTP request
        // buffer first part of HTTP request in HTTP_req array (string)
        // leave last element in array as 0 to null terminate string (REQ_BUF_SZ - 1)
        if (req_index < (REQ_BUF_SZ - 1)) {
          HTTP_req[req_index] = c;          // save HTTP request character
          req_index++;
        }
        // last line of client request is blank and ends with \n
        // respond to client only after last line received
        if (c == '\n' && currentLineIsBlank) {
          // send a standard http response header
          client.println("HTTP/1.1 200 OK");
          // remainder of header follows below, depending on if
          // web page or XML page is requested
          // Ajax request - send XML file
          if (StrContains(HTTP_req, "ajax_inputs")) {
            // send rest of HTTP header
            client.println("Content-Type: text/xml");
            client.println("Connection: keep-alive");
            client.println();

            // send XML file containing input states
            XML_response(client);
          }
          else {  // web page request
            // send rest of HTTP header
            client.println("Content-Type: text/html");
            client.println("Connection: keep-alive");
            client.println();
            // send web page
            webFile = SD.open("index.htm");        // open web page file
            if (webFile) {
              while (webFile.available()) {
                client.write(webFile.read()); // send web page to client
              }
              webFile.close();
            }
          }
          // display received HTTP request on serial port
          Serial.println(HTTP_req);
          // reset buffer index and all buffer elements to 0
          req_index = 0;
          StrClear(HTTP_req, REQ_BUF_SZ);
          break;
        }
        // every line of text received from the client ends with \r\n
        if (c == '\n') {
          // last character on line of received text
          // starting new line with next character read
          currentLineIsBlank = true;
        }
        else if (c != '\r') {
          // a text character was received from client
          currentLineIsBlank = false;
        }
      } // end if (client.available())
    } // end while (client.connected())
    delay(1);      // give the web browser time to receive the data
    client.stop(); // close the connection
  } // end if (client)
}//End main loop


// send the XML file with analog values, switch status
//  and LED status
void XML_response(EthernetClient cl)
{

  int count;                 // used by 'for' loops
  int sw_arr[] = {10,9};  // pins interfaced to switches

  cl.print("<?xml version = \"1.0\" ?>");
  cl.print("<inputs>");
  
  // read switches
  for (count = 0; count < 2; count++) {
    cl.print("<switch>");
    
    if (digitalRead(sw_arr[count])==HIGH) 
    {
      cl.print("ON");
    }
    
    else 
    {
      cl.print("OFF");
    }
    
    cl.println("</switch>");
  }
}

// sets every element of str to 0 (clears array)
void StrClear(char *str, char length)
{
  for (int i = 0; i < length; i++) {
    str[i] = 0;
  }
}

// searches for the string sfind in the string str
// returns 1 if string found
// returns 0 if string not found
char StrContains(char *str, char *sfind)
{
  char found = 0;
  char index = 0;
  char len;

  len = strlen(str);

  if (strlen(sfind) > len) {
    return 0;
  }
  while (index < len) {
    if (str[index] == sfind[found]) {
      found++;
      if (strlen(sfind) == found) {
        return 1;
      }
    }
    else {
      found = 0;
    }
    index++;
  }

  return 0;
}

Use this snippet of code to make the SPI bus idle : DHT22 Webserver - #34 by Peter_n - Sensors - Arduino Forum

The VirtualWire uses three pins, pinRX, pinTX, pinPTT. They are set all three, regardless if you use them or not.
Set the pins (all three) before calling vw_setup().

vw_set_rx_pin(...
vw_set_tx_pin(...
vw_set_ptt_pin(...
vw_setup(...

Don't use pin 10,11,12,13. Those pins are the SPI bus which is used for the SD card and the W5100 Ethernet chip.

0 = RX
1 = TX
2 = switch
3 = switch
4 = chip select SD
5 = switch
6 = led
7 = led
8 = led
9 = led
10 = chip select Ethernet (must be output for SPI bus).
11,12,13 = SPI
A0...A3 = analog inputs.
A4,A5 = I2C bus.

If you don't use the I2C bus, you can use those 2 pins. But you need three for the VirtualWire.
So you are 1 pin short !

You are not disabling the w5100 SPI. The w5100 SS is D10, not D53. Leaving D10 floating will cause the SD.begin function to fail.

void setup()
{
  // disable Ethernet chip 

  pinMode(10, OUTPUT);
  digitalWrite(10, HIGH);