Java not detected in redhat 5 linux firefox

I have installed the latest java 1.6_24 version using rpm on linux redhat machine. "java -version" works OK, I have the link:
libjavaplugin_oji.so -> /usr/java/jre1.6.0_24/plugin/i386/ns7/libjavaplugin_oji.so
Also:
/usr/bin/java -> /etc/alternatives/java
/etc/alternatives/java -> /usr/java/jre1.6.0_24/bin/java
In the past install (java 1.4) there where also some references to "jvm" but these don't exist in 1.6 version.
Must be something else missing..

libjavaplugin_oji.so is the old classic Java plugin. For Firefox 3.6.x you need the Next Generation Java plugin (libnpjp2.so)
See;
* http://www.oracle.com/technetwork/java/javase/manual-plugin-install-linux-136395.html
* http://kb.mozillazine.org/Java

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