Intro movie in Media Portal ..???

I have Media Portal and am Using STEAMmp with the moving pictures add in.. I have a HT intro i would like to play but when I set it up in the Moving Pictures ADVANCE options i get nothing when i play a movie from steammp... is there another setting im not seeing !? Any help would be great im trying to get everything done in 2 days !

Is there a Certain format the intro movie needs to be in?