Question [Q] WiFi Region @ Pimpdroid 2.5.0


i'm having trouble connecting to a TP-Link Archer C2 (2,4 Ghz) when the router is set to wifi-region 'Germany'.
The device doesn't even find the WiFi-Network.
If I set the region to 'United States', the Tab3 finds the network, connects and works just fine.
Since i'm living in germany, i'd like to use the proper region-settings (concerning max signal strength, allowed channels etc).

My device is a P5210, rooted and running on Pimpdroid 2.5.0.

Are there any known Problems with the Tab3 or Pimpdroid?
Is there any Android-setting for this?

Thanks in advance