I even updated the SuperSU from the Play store but was getting the same error essentially.. also tried the Superuser FIxer app from PS but it also stuck at
Gaining root access :fail
I tried flashing the SuperSU 1.51 .zip from the recovery mode by placing it in internal memory but to my surprise the file path of the internal memory was not visible and when i inserted a sdcard and copied the file to it and then tried to flash it thru recovery, it was successfull but got a few erros , something like who file not successful(will try again and post exact same thing in by tomorrow)
in the meanwhile can anybody help me? plz its urgent..
phone was on stock rom 4.3 OS before root