If you were using a hack program or an Xtrap bypass you will need to refrain from using these again (And delete them from your computer), If you were not;;;
Do not Re-install the HGWC.exe file on it own under any circumstance, Only perform a full re-install via the Z8games website;
1. Some programs that are not hack related may be "considered hack tools" under XTrap to certain users, the most common being Xfire, FRAPs, Or A virus on your computer.
Solution? Temporarily close all un-needed items when playing Crossfire, you can do this manually or by using a program such as Smart Close.