The solution to the problem is to disable first Web Service Print on the printer and then
add the Printer on the Printserver.
If Autodetect is used and WS Print is enabled, Windows will somehow detect port 3910, because its lower than 9100
and somehow stores this information.
The Windows "port dialog" does not show this, its shows "lpr printing port 9100", but as said, somehow the UPD Driver
now knows that WS Print was enabled during port creation and uses this later and the timeout occurs.
Only disabling the WS Print feature, after the port was added, does not work too, the printqueue must be added
after WS Print is disabled.