Product key

Hey all,

I got this problem I am working on practicing for the 70-291, and I bought the MS self paced 290, 291, 293, 294. I got the CD but not the product key, any idea what I can do I tried the ones MS provide but no luck and I also tried to download the server 2003 images from ms but they don't work, anyone have a trial cd for that came wit there self paced training kit?

Cheers