Can't register CK with free codes given out.

Hi. I got a new computer and have put the CK on it. Of course, some of the functions I would like to use I can't because I don't have a registration. I remembered the free code given out a while ago, and put it in exact. It did not go though. I have tried it on multiple versions including the patch, and several times each. Is this happening to anyone else?

Probably putting it in the wrong location. Your probably trying to enter it at NoLimits/Registration Recall. You have to enter it at Help/Registration

I know.