Need help

I have some scripts in my init.d folder, but when i check it on init.d log file.. it doesn't work. I do same as tutorial that i got here.. but it said "nonexistent directory" . Is there anyone know why?
I still confused because two of my scripts (zipalign & loopy_smoothness) are working.. but not for the other..

Here one of my tweaks :
#!system/bin/sh
echo "64" > /sys/module/lowmemorykiller/parameters/cost
echo "0,1,2,4,9,15" > /sys/module/lowmemorykiller/parameters/minfree
echo "0" > /sys/module/lowmemorykiller/parameters/debug_level

The log file said " nonexistent directory "..

Thanks before.. and sorry for my bad english..

Using Hisense E-860