mobile

i am trying to get thing working
rooting my device using Nexus Root Toolkit 2.1
installed supersu and busybox
and granted access to game killer
but after i open game killer i see this message
"root privilege is needed! Please visit wap.z4root.cn to download root tools!"
i installed root checker basic to be sure i did every thing good , all good
my device is rooted

what should i do ?

note : this is my first time rooting a device , and nexus 4 is my first andriod device