system app not working I have a widget to turn data connection on and off. Since I upgraded my Nexus 4 to Lollipop, I get the message "widgetsoid needs to be installed as a system app"

So I rooted the phone, moved the apk file from /data/app to /system/app. I set the permission to 644. Rebooted the phone.
Still, I get the the same error message. Do I have to uninstall the app, and reinstall it from the apk?

What am I doing wrong? I use a custom launcher, if that matters.
How to install Widgetsoid in system/app folder?

With ADB connected to the phone:


Mount/system in read-write mode.
Run the command adb push Widgetsoid.apk /system/app/Widgetsoid.apk
Remount /system as read-only.
Reboot your phone.