910F can't update from External Storage @ update from external storage is disabled

Hi Guys, I'm new here and i need help .. I'm trying to Flash a ROM ( http://forum.xda-developers.com/note...s-rom-t3123512 )
Is not first time when i'm trying to install custom roms on android phones..
My phone is ROOTED , i have SuperSU in Menu after data reset and cache, i can Wipe Data/factory reset and Wipe Cache. But i can't Update from External Storage or Adb
Phone give me this error on Recovery menu "Update from external storage is disabled"

What should i do ?
Please help me .. I don't know very well how to solve this , please give me a detailed fix...

Thanks alot guys !