Exphryl

I have an unlocked & rooted Nexus 4 right now using Android 4.2.1 I downloaded and installed Gameguardian 6 and when I open it, it shows it is running in the background but I can not actually access the program at all (I select it and it boots me back to the App drawer or home screen or wherever I pulled it from at the time). I'm just wondering if it's just the version of Android i'm using atm, or if there could be an another issue.