Password protect my Ethernet Web Server - SOLVED

I enter my web page with a password, I click on the button, but after clicking the button, the blank page opens. help please ..

/*
 Web Server
 with
 http auth mod by Minh Truong
 5-18-215
 */

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

// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x2D };

byte gateway[] = { 192, 168, 1, 1 }; //               <------- PUT YOUR ROUTERS IP Address to which your shield is connected Here
byte subnet[] = { 255, 255, 255, 0 }; //                <------- It will be as it is in most of the cases
IPAddress ip(192,168,1,33);

// Initialize the Ethernet server library
// with the IP address and port you want to use
// (port 80 is default for HTTP):
EthernetServer server(80);
//char userPass[200];
//char header[500];
String header;
//int bufferSize = 0;
#define RELAY_CH1  2
#define RELAY_CH2  3
#define RELAY_CH3  4
#define RELAY_CH4  5
#define RELAY_CH5  6
#define RELAY_CH6  7
#define RELAY_CH7  8
#define RELAY_CH8  9

String readString;

void setup() {

       pinMode(RELAY_CH1, OUTPUT); 
  digitalWrite(RELAY_CH1, HIGH);  // switch on LED1
 
        pinMode(RELAY_CH2, OUTPUT); 
  digitalWrite(RELAY_CH2, HIGH);  // switch on LED2
 
        pinMode(RELAY_CH3, OUTPUT); 
  digitalWrite(RELAY_CH3, HIGH);  // switch on LED3
 
        pinMode(RELAY_CH4, OUTPUT); 
  digitalWrite(RELAY_CH4, HIGH);  // switch on LED4
 
        pinMode(RELAY_CH5, OUTPUT); 
  digitalWrite(RELAY_CH5, HIGH);  // switch on LED5
 
        pinMode(RELAY_CH6, OUTPUT); 
  digitalWrite(RELAY_CH6, HIGH);  // switch on LED6
 
        pinMode(RELAY_CH7, OUTPUT); 
  digitalWrite(RELAY_CH7, HIGH);  // switch on LED7
 
        pinMode(RELAY_CH8, OUTPUT); 
  digitalWrite(RELAY_CH8, HIGH);  // switch on LED8
  // Open serial communications and wait for port to open:
  Serial.begin(28800);
   while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }

  // start the Ethernet connection and the server:
  Ethernet.begin(mac, ip);
  server.begin();
  Serial.print("server is at ");
  Serial.println(Ethernet.localIP());
}


void loop() {
  // listen for incoming clients
  EthernetClient client = server.available();
  if (client) {
    Serial.println("new client");
    // an http request ends with a blank line
    boolean currentLineIsBlank = true;
   
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();
       
        if (readString.length() < 100) {
          //store characters to string
          readString += c;      //Serial.print(c);
        }
        Serial.write(c);
        header += c;
 
        if (c == '\n' && currentLineIsBlank) {

          //parse headers
          //bWluaDp0ZXN0 = 'minh:test' (user:password) base64 encode
   
          Serial.print(header);
         
          // Simpler just to find the credential string
          // send a standard http response header
          if(header.indexOf("bWluaDp0ZXN0") >= 0) {
            //successful login
            client.println("HTTP/1.1 200 OK");
            client.println("Content-Type: text/html");
            client.println("Connection: close");  // the connection will be closed after completion of the response
          client.println("Refresh: 20");  // refresh the page automatically every 5 sec
            client.println();
              if(header.indexOf("GET / HTTP/1.1") >= 0) {
                client.println("<!DOCTYPE HTML>");
                client.println("<html>");
                
                client.println("<HEAD>");
          client.println("<meta name='apple-mobile-web-app-capable' content='yes' />");
          client.println("<meta name='apple-mobile-web-app-status-bar-style' content='black-translucent' />");
          //client.println("<link rel=\"stylesheet\" type=\"text/css\" href=\"http://www.digital2u.net/autohome.css\" />");
          client.println("<meta http-equiv=\"refresh\" content=\"3;url=http://192.168.1.33/\"/>" );
          client.println("</HEAD>");
          
          client.println("<body bgcolor=\"#D0D0D0\">");
          //client.println("<hr/>");
          //client.println("<hr/>");
          
          //client.println("<h4><center><img border=\"2\" src=\"https://lh3.googleusercontent.com/-C6BoJrRUFko/UEUFeCwkvdI/AAAAAAAAAOc/E7gcYvPV6r4/s960/Logo.jpg\" /></center></h4>");
          //client.println("<hr/>");
          //client.println("<hr/>");
                   
          client.print("<center> <p> <h1>HOSGELDINIZ</h1></p> ");
          //client.println("
");
          //client.println("
");
          
          
          // Relay Status Display
          client.println("<center>");
          
              client.println("<table border=\"5\">");