There are lots of fake files/spam around now. These are often new releases & really popular files, they'll sit connecting for ages & then go straight to 'need more sources' but never download. You should look up a movie before download with Bitzi to get some idea of it's content & quality
How to use Bitzi

Stay away from files with heaps of sources, go for a file with 10 sources or less. Vary your search terms & try the All Types search. Try searching at different times of day, as users in different time zones log on & off, new sources become available. it's just a pain at the moment with all the fakes... be patient & keep searching.