Hi for all good evening
My problem is, my wifi shield does not detect my wifi network in the two security modes (open and WEP), im using connectivity in my laptop to feed the arduino with internet access wirelessly, the arduino board is connected with the same laptop, and a strange point is that, my iPad can detect and link with this wireless network normally without any problems in both cases (open and WEP secured), but the arduino does the scanning and detects ZERO networks.
Im using the scanning code as it is from the arduino website… Thanks in advance 
#include <SPI.h>
#include <WiFi.h>
void setup() {
// initialize serial and wait for the port to open:
Serial.begin(9600);
while(!Serial) ;
// attempt to connect using WEP encryption:
Serial.println("Initializing Wifi...");
printMacAddress();
// scan for existing networks:
Serial.println("Scanning available networks...");
listNetworks();
}
void loop() {
delay(10000);
// scan for existing networks:
Serial.println("Scanning available networks...");
listNetworks();
Serial.print("\n");
}
void printMacAddress() {
// the MAC address of your Wifi shield
byte mac[6];
// print your MAC address:
WiFi.macAddress(mac);
Serial.print("MAC: ");
Serial.print(mac[5],HEX);
Serial.print(":");
Serial.print(mac[4],HEX);
Serial.print(":");
Serial.print(mac[3],HEX);
Serial.print(":");
Serial.print(mac[2],HEX);
Serial.print(":");
Serial.print(mac[1],HEX);
Serial.print(":");
Serial.println(mac[0],HEX);
}
void listNetworks() {
// scan for nearby networks:
Serial.println("** Scan Networks **");
byte numSsid = WiFi.scanNetworks();
// print the list of networks seen:
Serial.print("number of available networks:");
Serial.println(numSsid);
// print the network number and name for each network found:
for (int thisNet = 0; thisNet<numSsid; thisNet++) {
Serial.print(thisNet);
Serial.print(") ");
Serial.print(WiFi.SSID(thisNet));
Serial.print("\tSignal: ");
Serial.print(WiFi.RSSI(thisNet));
Serial.print(" dBm");
Serial.print("\tEncryption: ");
Serial.println(WiFi.encryptionType(thisNet));
}
}