Ok, now the problem is resolved and can login to the panel.
Another Issue:
The media library page doesn't work after upgrade.
I can create account, upload the files on "file" like usual, can edit and create playlist,
but if you click on "media" nothing happen. The page is blank (with template).
Try to purge the cache. Nothing. Try with Safari, firefox & chrome.
On every page it seems not end to load the page completely. the symbol of the page load is always running.
On IE8 the panel chrash every 5 seconds.
All was working fine till the version of last friday. Probably problems with new fastCGI