You need to have the following items in your classpath, or Limewire won't work. Put them into your LimeWire.lax (if they aren't already there) and try to use the static path.

.../LimeWire/swing.jar
.../LimeWire/LimeWire.jar
.../LimeWire/jl011.jar
.../LimeWire/collections.jar
.../LimeWire/xerces.jar
.../LimeWire/lax.jar
.../LimeWire/
/usr/lib/java/lib/rt.jar (or wherever your class lib is on your computer)

If it still doesn't work try starting LimeWire directly with the command:

java -classpath swing.jar:LimeWire.jar:.....:. com.limegroup.gnutella.gui.Main

note that LimeWire will work then, but some features may not be accessible.