Do you mean that LW connects & searches ok with a number of search results showing at the top of the search page, but the search page itself is blank?

Try updating your Java. Download the JRE offline installer & reomve any other Java versions already installed on your computer, before you install the new one. Even if you already have this latest Java, reinstall it anyway (just in case something's corrupted in the existing version).
Java SE Downloads

If that doesn't fix things, delete LW's preferences folder when LW's properly closed. See the thread below for instructions...remember to show hidden files & folders first, or you won't be able to find the preferences folder
LimeWire Pref Folder in Vista