This is what me and my friend did to get the hack to work,
first, go into your combat arms folder which should be ''C:\Nexon\Combat Arms'' for most people
second, go into your HShield folder and delete the Update folder.
third, click on strife's hack BUT DONT PRESS OK.
fourth, open CA, dont press start yet.
Heres where it kinda gets tricky, Click on game start but get ready to press the ''Enter'' key right after the Combat arms startup disappears.
It might take awhile to load, so just be patient.
When an error message pops up, ignore it, but don't exit out of it or anything. leave it up. combat arms will eventually go back up and then you can start playing.
You have to delete your Update folder everytime you start the hack again.
Congradulations, you are now in game!
Credits to ArbritraryDrone and skool who beat me to it xD