Okay just so you are aware "hack tool detected" bug has recently been an issue with the newest patches - You can see multiple threads with the same exact problem , So it very well may be Z8games.
If not;
1. If you are using a router you might want to read this;
[SOLVED] Disconnect Due to Incorrect Map Info/Hack Tool Detected - Z8Games
2. Some programs interrupt normal Crossfire game play, the most common are an Anti-Virus or Firewall is conflicting with Crossfire's normal gamer performance. You may want to temporarily disable these programs to see if this is the issue - If it is , Please add Crossfire to your programs "Exceptions List" Or consider switching to another program.
3. Some people have problems with Xfire and Crossfire running simultaneously - Try disabling Xfire when in game. Other programs such as MSN, Skype, and many more can also create a disruption in your gameplay - You can also use a program such as "Smart Close" To automatically disable any un-needed programs or do this manually.
SmartClose download and reviews from SnapFiles
4. A virus may be causing conflict with Xtrap! Please run a full virus scan to check for any malicious files -
AVG
AVG Free | Antivirus Download | Free Virus Protection
MBAM
Malwarebytes' Anti-Malware: Malwarebytes
5. Lastly, You may need to perform a clean re-install , this means delete Crossfire in it's entirety, I advise you follow this tutorial on doing so.
[GAME ERRORS] GUIDE - Performing A Clean Installation Due To Errors - Z8Games
Also, Do not completely remove your Anti-Virus program, Simply Add Crossfire to your Exceptions list - this in no way increases your vulnerability to viruses.
Good luck and enjoy!