error message creating a final user

Hi all
 
i have some problems creating a web/final user, quota matters, i have selected disk usage and bandwith quotas in admin user and reseller user, but i allways get the same error:
 
Error : 70500326 : User added successfully; Error occurred while setting Disk Quota.
 
i need some help please
 
thanks all

This problem appears if Disk Quota Management is disabled in HC panel. Enable it from HC host level path " Server Manager :: Global Setting ".