PROBLEM FOUND - I think!
Ok, so I've been through and changed all settings through the Edit tab one by one. I then (as per the other cameras) selected a sub stream for mobile monitoring at a lower bitrate... As soon as i did this, it didn't like it and disconnected.
I then went back in, changed it to stream 1 only and its working again! Thought the licence was per camera and not per stream? Don't have this issue with the built in licences...
Dan