This issue was also pointed out by @firegame1234. What me and him are saying is that we do the following:
1. We Cipher the hack
2. Inject it with Perx, Etc.
3. Run Combat Arms
4. once on the loading screen, none of the Hack Menus show up, even though it was injected
Ive had this issue as well, i dont know whats causing it. but maybe we can get an explanation?
Try to inject with Portal Injector.
Make sure you have the latest version of DirectX installed and are running whatever inejctor as Administrator.