Google Chrome Remote desktop

Been trying to set above up with Windows PC (having AVG) as host, and Chrome book as remote computer. PC Screen says I am connected but all I get is a grey screen on the remote, cannot see my host computer on the remote.  When I turn AVG fire wall off  "Chrome Remote desktop" works perfectly, so it is AVG stopping it from working.  Obviously dont want to leave Firewall turned off.
Settings I have changed In AVG, with no success in getting GoogleRemote through are;

settings> full protection>enhanced fire wall, Select system rules “allow remote Desk top connections to this computer”=enabled
and, settings> exceptions add “https://remotedesktop.google.com/access”
But still does not work on remote computer. 
Have searched internet but can find nothing.  There are some suggested generic settings in Google Support but i cant tie them in with AVG, I am not an IT techie..   Any help appreciated.  thanks Paul

Hello Paul,
We appreciate your efforts in trying to resolve the issue. We have sent you an email with the link to get connect with our technical team, please follow that email and you will be able to resolve the issue.

Hello Paul,
We appreciate your efforts in trying to resolve the issue. We have sent you an email with the link to get connect with our technical team, please follow that email and you will be able to resolve the issue.