[Q] Need a help (root LG L9 P768)

Hi guys I've successfully rooted my Lg L9 P768 using this guide http://forum.xda-developers.com/show....php?t=2173465
I made a mistake when I tried to root another LG L9 device because a I didnt used related Hex-Edited BIN file and KDZ file.
The device stop on screen with android logo and a red mark exclamation.
How can I do?