Why my Google play store stopped unfortunately?

[Chirag Sama]

I m using note 2 root on cm rom 12.1 nighty. I tried all things like clear data , clear cache of Google play store, Google play service. I even removed account. Even change Google play store in system app( as I downloaded it's apk) . Even cleared data and cache of Download Manger.when I click install button of any app in Google play store. "unfortunately play store stopped" window keep coming after2 sec. I have to wipe data to get rid of dis window