help problem vpn L2TP IPSEC VPN

Can you help?
I have a problem with a vpn type (L2TP IPSEC VPN) just istallo Comodo antivirus stops working (error impossible to encrypt data).
But vpn set (tipe Automatic) then try to start the connection but then rightly error.

Unistal comodo antivirus vpn type (L2TP IPSEC VPN)connect ok.

thanks in advance for your attention

Is your problem with Comodo Firewall or Comodo AntiVirus?