iMovie won't play my iTunes library

Hey all,

I imported my 'stuff' over to my new MBP - movies, pics, music. Now I want to edit one of my iMovies. The problem is that it won't play my iTunes library. It keeps asking me to activate the machine. I do so, and I get a confirmation that it worked. Then I go back in to iMovie and no dice.

I deactivated all my accounts and then activated just my MBP and it still didn't work.

Any ideas?

Beleive it or not, I called AppleCare and they advised me to download the latest iTunes patch. I did and bingo - I was back in action.