Connecting two devices at the same time is not allowed

[tof]

Hello everybody,

i have a problem while configuring the usb server software.

My setup is a pc which is connected via lan adapter 1 to the internet.
I gain access to the pc over dameware.

On lan adapter 2 is an unmanaged switch connected. At the switch i connected four hdmi display over gigabit adapter via lan cable. (http://www.lindy.de/HDMI-Display-ove...d0101&pi=38080)
A TV is connected via hdmi with the adapter.
Every gigabit adapter use his own ip 169.254.10.10x.
When i start the usb server software i can see all 4 adapters.
The first one is device type display (network av adapter).
The three others are device type network docking.

When i enable the first two adapter (a display and a network docking) everything works fine. On the two TV's i see the windows desktop.

If i want to enable a further adapter i get the message:
Connecting two devices at the same time is not allowed.

But i want to configure 4 tv's via lan to the pc.
What went wrong?
Why is the first adapter type display and the other network docking?

The displayling support tool only mentioned that the dameware mirror driver is old. The other software is ok (windows 7 sp1, latest updates, latest graphic driver).

Thank you for your help.

Regards
tof