getpwnam vhostmng: unable to create new hosting - help!

[i-nox.de]

i get the following error message as soon as i try to create a new hosting:

Unable to assign variables for PHostingForm: Unable to get hardquota state: vhostmng: Unable to getpwnam for user testuser vhostmng: Unable to getpwnam for user testuser vhostmng: Error: Unable to find user testuser or bad uid

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0: /home/psa/admin/htdocs/domains/hosting/phosting_setup.php:290 psaerror(string "Unable to assign variables for PHostingForm: Unable to get hardquota state: vhostmng: Unable to getpwnam for user testuser vhostmng: Unable to getpwnam for user testuser
vhostmng: Error: Unable to find user testuser or bad uid")


vhostmng: unable to get getpwname for user testuser

besides, quota is disabled. i need badly to create some new sites, so please: any ideas or help around?

- Bernhard