It sounds like you missed the optional steps in this post, which make the change permanent. Otherwise, you're just dumping values into /proc/overclock. Anything in /proc is refreshed on reboot, so there has to be a script to put those values back into /proc/overclock.

 

Mount R/W before those two steps. Mount back to R/O afterward. That will make your changes permanent.

The install-recovery.sh script simply includes the insmod /system/lib/modules/overclock.ko and /system/xbin/setscaling.sh commands. It will be run on boot, resetting the frequency and voltage options you've put in your setscaling.sh file every reboot.

Make sure that your phone is stable at the values in your setscaling.sh before you make it permanent. Also, if you decide to try different values (higher clock, lower voltage, etc), I'd suggest renaming the install-recovery.sh script to a .bak before doing so. Otherwise, you may get stuck in a boot loop if the CPU isn't able to operate on the new settings (and this script is constantly trying to set those values).

 

The insmod /system/lib/modules/overclock.ko command is failing? What error is it failing with? If the file is indeed in /system/lib/modules and it's still failing, it may have become corrupted somewhere between the initial download and move to its final destination.