WiFi Shield WebServer Example

Development Tools IDE 1.x
2

Sounds like you did not upgrade the wifi shield firmware. Add this to your sketch after you start the serial port. If the version is not 1.1.0, then you need to upgrade the firmware.

  // check for the presence of the shield:
  if (WiFi.status() == WL_NO_SHIELD) {
    Serial.println("WiFi shield not present"); 
    // don't continue:
    while(true);
  } 

  // check firmware version
  Serial.print(F("Firmware version: "));
  Serial.println(WiFi.firmwareVersion());