Xibo CMS 1.8 - XMR : Exception in Run: Handle invalid

Scenario:

PC1 (My Home) Webbrowser
PC2 (My Home) Xibo Client
Data center: Windows 2008 Server : Behind firewall : 212.xxx.xx.xxx portforwarding 192.168.2.233:9505

Screenshot for this scenario works fine after Reconfigure XMR.

Sending commands I still have problems, but am still testing