I formatted my hard-disk, and reinstalled windows (now I have Windows 98 Second Edition). Then I installed Java 1.4 and LimeWire.
The path to which LimeWire's shortcut points is:

"C:\Program Files\Java\j2re1.4.0\bin\javaw.exe" -Xss64k -Xms4m -Xminf0.10 -Xmaxf0.25 -Dsun.java2d.noddraw=true -jar RunLime.jar

But it still doesn't work!