Can't import clip into IMovieHD

[alba17.livejournal.com]

I can't import a clip into IMovieHD. My previous vids (not many - I'm a newbie) were done on IMovie6, which always imported clips, eventually. Normally I import .mov files with DV/DVCPRO compression from MPEG Streamclip. This clip, I've changed into different compressions, into .avi and .dv, and it won't import any of them. IMovie6 WILL import it, but I want to use IMovieHD since I discovered it has more features, most importantly audiowave. I've imported other clips from the same VOB file (ripped DVD) with no problem. The clip is short. This is driving me crazy and I have no idea what to do!