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also, i never can update from joomla updater both admin tools and backup, is this normal ? each time i must login to your site, download, and install as a new extension.

No, that's a problem with your Joomla! installation. Unfortunately, I am told that these known issues won't be fixed in Joomla! 2.5 :(

i've tried to disconnect, removed cache and cookies, but admin tools is stuck here..

What happens when you click the orange button on that page? Does it reload the page? Or does it sit there? In the latter case the problem is a third party plugin which screws up Javascript on your site's back-end.

I already told you: In the latter case the problem is a third party plugin which screws up Javascript on your site's back-end. Why don't you just try disabling plugins (especially "system" plugins) one by one to see which one is causing the issue?

Instead you went on a limp and made up a completely imaginary cause, ACL permissions, which is entirely different than what I suggested. Then you got Sander involved, asking him the wrong question based on your imaginary root cause. The poor man tried to reply as best as he could TO THE WRONG QUESTION.

Moreover you are asking me a completely different question, about a completely different product (Akeeba Backup) which is answered in its documentation. Then you are speculating that your question is a problem...

Sorry, I really cannot help you.