There are fake files all over the network. They'll sit connecting for ages, then get stuck needing sources forever. Always check movie files with Bitzi before download. If a file has heaps of sources but no Bitzi rating, chances are it's a fake (just because a file has heaps of sources, doesn't mean that they're genuine sources). Music doesn't get rated as much with Bitzi. It's worth avoiding the files with huge numbers of sources...go for a file with around 10 sources.
There's a lot more info & tips in these 2 threads, including info about using Bitzi. The threads are referring to LW but still apply to FW.
Fake files showing up in search results
How to find music