Could you both please give your details (april474 - sorry for any repeat questions, at least you tried to give us some details)?
System details - help us to help you (click here)

If LW has suddenly stopped working, the first thing to try is: 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.

If that doesn't help, get back to us with those system details