Forum:User can't log in anymore.

Hi everybody, I'm an administrator of Nonciclopedia. One of our users, Giallo Antracite, has a big problem: he can't log in anymore since monday, 20, except for one time. (So this means that the password was not changed by someone). Is there a reason and, more important, a solution to this problem?

Thanks in advance for the help. MFHTalk to me

PS: I'm sorry if my english is not perfect.