Are you connected properly (how many green connection bars do you see)?
If your connection is ok, try this: Problems with the search

And if that's no help, delete LW's preferences folder when LW's properly closed. See point 3 here & also point 2 if you've used older versions of LW in the past (there could be a folder in either location).
Fixes for LimeWire
This will kill all of your settings within options, you'll have to go back through afterwards & reset things.
LimeWire Pref Folder in Vista

Well I dunno, I tried all that stuff. Deleting that folder dosnt allow me to even open Limewire anymore so that didnt work.
I changed the Port number and added the IPs to the connections and still nothing.
I think my Limewire is just broken

Reinstall LW & see if the search is any better. Make sure to use the offline installer (when you click to download LW, a box will pop up asking if you want to save. Cancel out of that & you'll see an option to use the offline installer). Deleting that prefs folder shouldn't stop LW from opening!

I have tried re-installing lime a few times now and nothing is working.
Do you kow what may be causing this problem?