Root [AT&T] Gaining Root access -Fail

[bdlif]

My galaxy s3 i747 got a JB 4.1.1 update. I ran through the CWM root instructions with no errors. But when I try and use Su Binary Updater when it gets to Gaining Root Access, I get fail. When I use root checker it says not rooted. When I use Busybox it states there is a problem opening shell with root access.

All this was in place and working until the JB 4.1.1 update. Any assistance would be appreciated