firefox and java

[Gerhard Magnus]

I'm trying to get the java plugin working with Mozilla Firefox running
under Fedora 3.  I believed the Java Runtime Environment 5.0 has been
installed successfully in /usr/java/jrel.5.0.  I put a link to the
file /usr/java/jre1.5.0/plugin/i386/ns7/libjavaplugin_oji.so
in /usr/lib/mozilla/plugins.

Software I'm running from a website needs Java -- but I keep getting the
message that J2SE50 needs to be manually installed.  I can't tell if
this is some problem at this website or that I haven't installed Java
correctly.

Is there anything obvious I've done wrong here -- or an easy way to
check if I've done things right?  I was thinking of trying some other
website using Java in an obvious way so that if the plugin wasn't
installed correctly I could tell.

Any suggestions for troubleshooting this would be most appreciated.