If you haven't heard Combat Arms went through a patch. Along with the new content comes the lack of hacking for the time being. Hack Shield has also updated yet again.
Changes you will notice(may be operating system dependent b/c I run Vista-32 bit):
Combat Arms will NOT run in compatibility mode
Hack Shield now detects the usage of injectors IMMEDIATELY
(Can not be sure about hacks being patched, detected, etc)
(Can not be sure about bypasses being patched, detected, etc)
(Can not be sure about trainers being patched, detected, etc)
Those last 3 are uncertain because they will not run. If you can not inject a bypass you can not hack. So I'm guessing now the face of hacking this game has changed a bit and we must be patient.