Default [Q] KFHD 8.9'' Cannot Execute SU- Permission Denied


I forgot to disable OTA updates for my fully rooted KFHD 8.9'' and lost root access. I tried to re-root the tablet using the Bin4ry Method but there was some kind of error and now my tablet will load but everything is black, no app icons, etc. (its bricked). When I try to root the tablet now, it says that superuser is denying my root attempts. I have also tried to recover the device but encounter the same problem. I cannot access the superuser app on my tablet. Can anyone help?? Don't hesitate to post questions I'll try to the answer them ASAP.

I'm using Windows 7; my device is detected as an Android Composite ADB Interface