sorry I cannot connect to the link.
check that you have java on /usr/java
check that there is a file "/usr/java/j2re1.x.x_xx/plugin/i386/ns610-gcc32/libjavaplugin_oji.so" (x depends on the j2re version)
In /usr/lib you will find you Mozilla home directory. It will be something like:
note: if you have upgrate Mozilla you may have more than one.
For each Mozilla directory go to the plugins and check that you have a file called "libjavaplugin_oji.so". This file should be a link to the file "/usr/java/j2re1.x.x_xx/plugin/i386/ns610-gcc32/libjavaplugin_oji.so".
if there isn't within each Mozilla/plugins directory execute the command
ln -s /usr/java/j2re1.x.x_xx/plugin/i386/ns610-gcc32/libjavaplugin_oji.so
: change the x to match your j2re version
At the end you should have in the Mozilla/plugins directory the following files:
flashplayer.xpt and libflashplayer.so ->Flash Plugin
libjavaplugin_oji.so (it is a linked file) -> Java Plugin
libnullplugin.so -> Default Plugin