LW 5 is not compatible with OSX 10.4 unfortunately due to the earlier Java version Jaguar uses.
You will need to revert back to LW 4, recommended is LW 4.16 but your choice of course. Before you install you will need to remove the
install limewire.pkg file from the
Receipts folder else OSX will prevent you from installing an earlier version.
See older version links here:
http://www.gnutellaforums.com/mac-os...link-here.html