Question Status 7

i tried to swap kernel in speedmod with that of the whisps 2.6 kernel, i edited the updater script and build .prop, but still when i m flashing it, i am getting status 7 error in cwm, sayin set_perm changes failed... . i used a tutorial on xda for modifying the scripts and whole process..
PHONE-GALAXY ACE PLUS
rom -CM 11 SpeedMod