[vchkpw] Error: Illegal username on change password

[Alessio Cecchi]

I have a domain in a box linux (with other domains that work well) that 
i cannot change the password for all users.

On this server is installed
netqmail + vpopmail 5.4.5 (mysql and clear text passwd) + qmailadmin and 
vqadmin.

The /var/qmail/user/assign is ok (i think..)
What i can check?
--
Alessio Cecchi ++ www.skye.it