WiFi Shield with Arduino Uno R2 not present

In the instructions to set this up (http://arduino.cc/en/Guide/ArduinoWiFiShield) my board is not natively compatible with the shield so I need to use a jumper. However I am not getting any success using a jumper to bridge the 3.3V to IOREF as they say to do.

Jumping 3.3V to IOREF (recommended)

Failing on this line:

if (WiFi.status() == WL_NO_SHIELD) {

I have tried:

  • DFU Wifi shield jumper on and off

Not sure what to do there...