I just flashed the superSU zip and now I can open the app and ES explorer can get root access. We will see how we go.
thanks to all...
now the best custom roms for SM-N9005?
This is the one you should be using. It has the same name as the one for 4.4 so maybe you're flashing the wrong one?
Cheers. Will see how I go and I will keep you updated