Try downloading the latest Java client from sun microsystems 1.4 i think they're up to. get it here
http://java.sun.com/j2se/1.4/download.html
After you d/l it be sure to uninstall the 1.3 client and restart limewire ... it will say that it cant find its client ... direct it to the 1.4 client and you are set.
You should really upgrade out of Windows ME ... its short for mestake
just kidding.