joomla login error?

hi all,

i have just create a new site with joomla for my wife, but after a while i cannot login to the administration page.

I have not changed the password but not login. Note that the passwd was be memorized in firefox, ad i tried to login from another computer without success.

So i have reseted the password from altervista, but not. A can login in control panels of atervista, but not in the joomla admin pane.

How i can to do it?

best
MaX

EDIT

i can login to the phpmyadmin with the new passwd, but i still banned from my joomla admin pane. :mad:

i tried to delete the passwd field and login without it, but, not, still not working, so i have put back again the encripted passwd in the field. GRRR!! :mad::mad:

someone can help me? tnx