If you recently renewed your system, make sure you install all the updates. Because within those updates are programs that have a vital importance for your hacks to work. Such as the latest version of directX, c++ Redistrubutable, .Net Framework 4 etc.
I happened to have the EXACT same problem and the download of the specified software managed to make the hacks work. Sometimes its the layering problem with directX so just try to download the software first.
You can also try to check if your firewall and antivirus is blocking anything related to combat arms, the hacks, or the injector.