Cannot create coupon

When I try to create a coupon I am getting the error message
Fatal error: Class 'ps_DB' not found in public_html/administrator/components/com_virtuemart/classes/shipping/shipvalue.cfg.php on line 5

Hello, can you take a look at the file it is referring to? do you have ps_DB in it? Im looking at a default installation and do not see this in the file.

I see at file administrator/components/com_virtuemart/classes/shipping/shipvalue.php

$db = new ps_DB;

$dbv = new ps_DB;

I have another component wich hacked shipping methods (shipvalue). It is called virtuemart canadian taxes. Maybe this code was added by that component.

I would appreciate your help to solve this issue. Do you want administrator access or ftp?

yes that would be helpful. Please pm the temp access for both ftp and administrator to me.