flash your phone with CF-Root-SGS2_XW_XEN_KJ3-v5.0-CWM5.tar using Odin3 v1.85
CF-Root-SGS2_XW_XEN_KJ3-v5.0-CWM5.tar
settings must be like this:
then put your phone in download mode, connect cable and press start.
this file is for Galaxy S II with KJ3 kernel only. (GSMBALOCH's phone has KJ3 kernel)
you can download more files for kernels here
http://forum.xda-developers.com/show....php?t=1103399