[vchkpw] Qmailadmin return "Error: Illegal username" when changing password

[michele]

Title: Messaggio

Hi, i've my server with Qmail+Vpopmail+Qmailadmin, all works fine, but when i try to change the password of a vpopmail user via Qmailadmin, i receive the error:

Error: Illegal username

 

Can you help me?

Thanks

Michele