Delete LW's preference folder with LW completely shut down. Instructions in this thread points 2 & 3(check both locations): Fixes for Limewire. This will reset all your option settings, so make a note of them first(if you can).

If still no joy, try uninstalling and deleting all versions of java from your Add or Remove Programs Control Panel. Then d/load and install Java Runtime Environment 5.0 Update 12, use the offline installer.

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If it ain't broke, fix it till it is!