Crossfire hack tool detected (1) (0:101:1:2)

I have just recenty re-installed crossfire on my computer. EVERYTIME, A few minutes after I log in, I would get a message saying "Hack tool detected (1) (0:101:1:2)". I have scanned my computer for viruses and there were no problems at all. The problem has been very annoying. Please help me fix it. Thank you.

Also I have tried reinstalling, check for internet problems, and running in administrator.