Everything has gone well for quite some time now; today, though, none of my users, including admin can log in.  database is not corrupt, so I don't know what could have ahappened.  has this happeend to any other user??  Please help resolve.

Does php maintain sessions?
Claudio 

also, could you please specify if you get some error messages or what happens and your server setup?

thanks.

bye,
Giovanni.