help my game killer icon disappears from the screen!

[RaySpeed]

Hi everybody.. I have a problem with game killer it used to work perfectly when I had the 4.4.4 kit kat rom installed in my galaxy s3.. but after I installed the official 4.3 jelly bean rom game killer icon doesn't stay long in the screen every time I try to hack angry birds epic or any other game the icon disappears and solution for this problem.