Slitherine

In several of the scenarios I have caps but am unable to use them. Does the enemy have a card that prevents me from using caps or is this a bug?

Please post your issue in the Matrix forum, as there's a bigger community for CoH over there that might help you with your issue:
http://www.matrixgames.com/forums/tt.asp?forumid=1081

tried and tried but I keep getting error messages trying to log in to that forum, I am registered , anywhere else I can post my question?

Your Matrix forum account was still not active as we were waiting for your account email confirmation.
I've manually confirmed it, so you should be able to login now.

Thanks