Problems configuring ssl gateway in VPS.

Hi! meed some help to configure ssl gateway.

I configured the ssl gateway service.

"Unable to connect to the server".

• I am using IIS in VPS:.
• Host binding www.dumilieudumonde.ch and dumilieudumonde.ch are configured in IIS.
• Windows Firewall.
• Port 80 (HTTP) and 443 (HTTPS) are open in firewall. 
• DNS Entry A type.
• www.dumilieudumonde.ch pointing to Ssl gateway.
• My server IP: 148.113.44.220

Thanks