Always "needs more sources"

[finch41002]

Every time I try to download a song (have tried a few different artists), it gives the needs more sources error message and eventually just stops, leaving some "queued" and some "connecting...". I have checked all firewalls, and reinstalled. I know that this may sometimes happen and has not previously been an issue except on rare occasions, but now happens on every download. help?...

edit: I recently upgraded my internet connection from Bellsouth DSL lite to DSL xtreme 3.0 (I'm pretty sure thats what its called) I was thinking this might be a problem because before the upgrade it worked perfectly fine. Any other threads I have looked at on this topic have been rather unhelpful and sometimes link to completely unrelated topics...

edit again: It may also help to know that I am on an XP operating system, and that when I tried to reinstall I had to use the offline installer because the recommended one wouldnt run (same problem it said downloading from 0 of 4xx) and I experienced the same difficulties with eMule and shareaza.

and another edit: I finally got one to work, but I did not change anything and it is running impossibly slow and several others are still "connecting", could it be a coincidence that all of the songs ive recently tried just dont have many sources (around 75)? seems unlikely and besides ive checked a few that arent working with bitzi but it says they're fine, most have between 10 and 20 sources etc. and all other tests for legitimacy and even the one that i got working should be running about 4 times faster at least, and one other thought, I recently switched to Firefox from IE, it seems unlikely to me but would that make a difference?