Never used cf auto root, but these are the steps that I would take.
First, I would try to update supersu from the Google playstore. If you've already tried this and it didn't work, I would follow the steps below:
Download Philz recovery to your pc, and supersu onto your phone (from the links below)
Unchecked the reboot option in Odin and with your phone on download mode connect the phone to the pc.
Flash philz recovery through Odin. Once it passes, pull your battery from the phone and disconnect the USB. Put the battery back in, and boot into philz recovery (power+home+volume up)
Once in recovery, install supersu.
You may still have to update the supersu binaries from the playstore, but (if so) it should work for you...
Sent from my SPH-L710 using Xparent Cyan Tapatalk 2
I'm just saying....
PROUD owner of a Sprint Galaxy sIII
(My wife thinks her Note2 is better.
She gets no root access until she apologizes...)