I'm having the same Issue & I recall seeing this once before along time back in another version of LW(free)
(Rite-Click\Advanced\Look up with Bitzi)
My LW/Bitzi window has not worked for 2 days now.

I rely heavly on Bitzi to keep Me from D\L crap,but I am going to wait a while longer & continue to try to access Bitzi as directed by Sleepless.

However if I recall correctly the last time I had this Issue after a bit of searching I found I had to delete the Limewire folder located in C:\Doc's & Sett"s\ User Name.
Then re-launch LW & set the User's pref's from scratch.
Also for some reason I keep thinkng that I might of had to uninstall My Java & Re-install it.

These are just quess's So Please wait for someone more qualified tell me if I am correct in My recollection?
Or just exactly what are the steps to fix this Issue?
Thanx For any Consideration & Direction
Pointman