I'm currently running the network edition of 5.0.5

when i change the password for an account, he can't login.
1: Setting the Virtual Host for a default domain.
2: Login as domain admin, select an account to change the password and select "Must change password".
3: when the account login as id, it says "an invalid request was made".
4: when the account login as id@domain.com, it is successful.

And ideas?

Thanks a million