Shield Compatibility

I've bought 3 components for my Arduino project:

I've got the Arduino (Uno) working fine with both the WiFi shield and the RFID shield separately, but when I stack them both on the Arduino it doesn't work.

Does anyone know why this is, or have any possible solutions?

Thanks in advance! :smiley:

From the sparkfun links you provided there It appears both shields need to own pin D7 on tour Uno. So you have a clash there.

Cheers! Geoff