Kerio WinRoute Firewall

I’m getting an error message "Antivirus is not running. AVPlugin failed to initialize: avast error 151."I’m using avast Home Ed. Build 4.7.957. I disabled McAfee in the Kerio program.
Has anyone had this problem and do you have a solution. I was using Zone Alarm and switched to Kerio WinRoute Firewall and Cyberhawk last week.