Blank Page Administration

Hello,
I use O.C v.1.5.6.4 7 & Theme Journal
I wanted to integrate a module (customer purchase), that shows me a blank page in the section "Customers"
- I removed the module manually in the Admin and Vqmod folder
Now I can log into the administration but it only opens a blank page. Can not access the dashboard. Thanks for your help.

Seems to be a php-error.
Turn on error_reporting (maybe you have to edit the admin index.php too) to see where the bug occures.

Thank you OSWorX
As I was at the beginning of the construction of the shop, I started all over again !