Disconnected due to hack took (1)(4.0)

Hi,

Every time I play crossfire I get kicked off within the first five minutes it says Disconnected hack took has been detected (1)(4.0). I have never used a hack in my life and have no idea why I keep getting this error. I have avast antivirus which I disable when I start the game and I plug directly into my modem, I have no router. I have Compaq Laptop... Pleaseee Hellppppp