Hello, sorry I dont speak german but I can read it

In order to use WPE on W7, you have to :
- start WPE as administrator (right click > run as administrator)
- start permedit as administrator
- select WPE in permedit and grant permissions
If you want to use WPE with the Wow client, you must run wow as an administrator too (if you dont, you will not be able to do anything)
so :
- start wow as administrator
- select wow in WPE
Enjoy