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Maybe try setting joomla to english version if its in italian mode, could be a problem with tranlastion file
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Yeap, this one works . . .
But only after a big variety of combinations, everything, work fine . . .
The right one was : setting joomla language to english ( but only in administrator side, not user ) and the installation was started from the " temp " directory on the server ( direct install don't work , like the url install too )
Thank you, Chef Groovy , you support is really fine ( i go to modify my topic name to : " resolved " )