What Java version have you been using? Some people have had problems with JRE 1.6.0_01. If that's the verison you're using, try this latest Java 6 update 2 instead. Use the JRE offline installer & remove your current Java version before installing this one.
Java SE Downloads

If that Java version's no good then try this older update. Same deal with deleting other Java versions before installing this one.
Archive: Download Java 2 Platform Standard Edition (J2SE) 5.0 Update 11

Now, 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.

Now reistall your Pro & see how it goes