Hi Notlob
Based on the link you posted, your shield is designed to work with the Arduino Mega, which has many more IO pins than the Uno. If you are using the shield with a Uno, then I don't think those extra pins connect to the Uno.
To check, when you plug the shield in, is there a double row of pins underneath the shield that are beyond the end of the Uno board?
All the best
Ray