Java 6 doesn't work on OS 10.6.8 i don't understand and need some help: java doesn't work anymore for a few months and i don't know why.

I have installed the latest version from apple, actually the 1.6.0_45-b06-451 on my imac 21,5" of middle 2010 and after checking the security system option and enabled the firefox plugin, i tried in safari and Chrome. Also tried with 32 and 64 bits kernel...

Finally i checked the XProtect.meta.plist to see the version limit allowed.
When i check on java.com it seem disabled or not installed, but on other sites it worked fine, like here (or javatester.org for examples)

What can i do for use without issues like i did before ?
Thanks a lot for any help...
If you install OSX Mavericks via the app store, Java will stay up to date &amp; working.