aimeee, that might indicate more of a problem.

Can you go to your OS X Utilities folder (in the Finder's "GO" menu) and find the "Console"?

If Console is running when you try to start LimeWire, it might dispaly a more detailed error message that will help tell us what the problem is.

You could just paste the key lines here, or PM them if it looks like they may contain personal info that you wouldn't want to paste.