If a file has 1451 sources, it's a fake!!!!!

Does every file you're trying to download give you the connecting/need more sources thing? Do a test...try to download an old song (2 years or more) with just a few sources.

If you still see connecting/need more sources, try this: Delete LW's preferences folder when LW's properly closed. See point 3 here & also point 2 if you've used older versions of LW in the past (there could be a folder in either location).
Fixes for LimeWire
This will kill all of your settings within options, you'll have to go back through afterwards & reset things. If you're not sure of your settings, go through LW's tools > options & write them all down, so that you can reset things later.