Please follow the following steps to change the overusuage status of your client :-
1) Please Login to Pesk control panel.
2) Click the "Domains" shortcut in the navigation panel.
3) Click the required domain name in the list.
4) Click on "Resource Usuage" under "Statictics" category.
5) Overuse policy. Specify what should be done when disk space and monthly bandwidth
(traffic) allotments are exceeded. We recommend setting this option to Overuse is
allowed. Otherwise, the Web site will be suspended when the resource limits are
exceeded. Click on "OK" once you have made the required changes.