Help. Can't open Playstore Android 4.4.2 topic

Hi. I just installed Androird 4.4.2 on my ZTE Open C (had enough of Firefox OS). My Version of Android had no Playstore, so I downloaded the necessary APK to installed it. The installation works fine but the Playstore won't open (white screen and it is gone after second). I also installed Google Play Services so that I could run Whatsapp (works fine). Am I missing any APKs for the Playstore or is my ROM just crap? :confused:

ZTE Open C
Android: 4.4.2
Kernel: 3.4.0 zte-lernel@Zdroid-SMT
Buildnumber: KIS_III_V2.0

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