Are you using XP or Vista?

It won't hurt to reinstall Java, if you installed it online before (ie over the net, rather than downloading the installer & saving it to your comp) then maybe there was some small corruption during the install?

Start off by clicking on the Java link in my other post. Then click on Download, in the JRE part (see pic below).


On the next screen, select your platform (XP, Vista etc) & then accept the license agreement & click 'Continue'.

Now you'll see the option to download the offline installer (see pic below).


Save that installer to your comp, then uninstall whatever Java you have now via Control Panel. Install the new Java & then restart your comp

If you're still stuck, delete LW's preferences folder. Check my other post for info about that. Make sure that LW's properly closed before you delete that folder - otherwise it won't have any effect.
You'll know if you've deleted the prefs folder properly - once you start LW up, you'll go through LW's setup again.

See how you go with that