Update: I've resolved manually adding a simlink to /usr/lib/jvm/java-6-sun-1.6.0.00/jre/plugin/i386/ns7/libjavaplugin_oji.so in "/home/user/.mozilla/plugin". Bye.
Update: jvm/java- 6-sun-1. 6.0.00/ jre/plugin/ i386/ns7/ libjavaplugin_ oji.so in "/home/ user/.mozilla/ plugin" .
I've resolved manually adding a simlink to /usr/lib/
Bye.