Do you mean that you can't click on anything in LW's setup wizard? Are you trying to click on options within the setup wizard, or on the 'back' & 'next' buttons? If you're not seeing any 'back' or 'next' buttons, try the advice here: http://www.gnutellaforums.com/313985-post2.html

When you downloaded Java, did you use the JRE offline installer? If not, try that. Download from here: Java SE Downloads
After you've downloaded the JRE offline installer, remove any other Java versions installed on your computer (via control panel > add/remove programs) before you install the new update.

If that doesn't help, try downloading the LW installer here: http://www9.limewire.com/download/LimeWireWin-full.exe