Hmm.. it works fine for me.
ll of my firefox plugins directory
Code:
$/> ll libjavaplugin_oji.so
/opt/firefox-installer/plugins/libjavaplugin_oji.so -> /opt/jdk1.5.0_01/jre/plugin/i386/ns7/libjavaplugin_oji.so
I guess you would have to change the libjava.. that u have linked to. Take a look at the one I have linked to.