i would like to change a password from a user with the command:

simias-user modify --url http://localhost --admin-name admin --admin-password admin --user USER_NAME --password USER_PASSWORD

but always came this failure:

Failed - Invalid admin credentials

I have changed my Password Configuration from the admin. its not the standard password.
i can login into the Webgui with the Administrator.
All other things works fine but this is important to know for me how it works...

Thanks for Help