Wifi shield trouble

Just got the Official Arduino Wi-Fi shield and I'm trying to mess around with it. I uploaded the "Connect to an open network" example, put in my networks SSID, and when i check out the serial monitor and i keep getting the WiFi shield not present message.

None of the lights on the shield are lit up but L9 does when i hit the reset button on the shield. I also have the micro usb plugged in if that matters.

I'm wondering if you found some answer. I have the same issue. I'm using the Official Arduino Wi-Fi shield with the XBee module.

What Arduino board are you using ?
I had the same problem at the beginning but solved changing the arduino board. ( Arduino Forum ), and then it worked fine.