Default Google Maps: Location with Wlan / LBS doesn't work

Hello *.*

i have a problem with Android 4.2 (i use MIUI 3.10.11 with a Xiaocai X9, by the way).

Google Maps and any other App using Location services only seems to work with GPS. Location isn't recognized via wlan / 3g.

I alredy upgraded to the newest Play Store 4.4.2.2.
I reinstalled Google Play Services (4.0.34).
I extracted NetworkLocation.apk from Minimalistic GApps 4.3 (http://d-h.st/mBO) and copied it to /system/apps
And yes, i rebooted after every change.

But still no luck.

However, apps like "Antennas" work pretty well and are recognizing my location via LBS.

Any ideas?