Same as the original problem! The second MP client can not connect to the first live stream, from the tvserver. But both can start a stream.
The most annoying ting is that this worked the first time i experimented with tvserver. But back then there were no support for usb-uirt and STB. So i decided to wait. But when i found the STB supported I installed the Mediaportal 1.0.0.0 RC2 and it dos not work.
I think it was around the mediaportal 0.2.0.0 rc2 ore something when it worked!!