My guess is that your install of JRE went wrong. It should not be installed in opt it should be in usr/java/jre***/bin. I think you will have to remove JRE then re-install. If you installed an rpm of JRE type rpm -e jre***. Then re-intsall and follow the Sun README that is at the Sun download site - to the letter.

You could try to rebuild the rpm without removing it. I have not tried this but according to Josh's GNU Linix Guide (jgo.local.net/LinuxGuide/) you can rebuild an rpm by using
rpm --rebuild gimp-1.0.0-1.src.rpm.
where you first downloaded the rpm.
No idea if that will work but if it does it will be quicker. Maybe try it and if it fails then re-install from scratch. Someone checking this list might say if I am utterly wrong.
Hope you get it this time. It is worth persevering LimeWire17 does work very well. I prefer it to BearShare.