Thanks for the repley.
I have the the switch because the router does not have extra LAN ports.
The printerserver has 10.0.0.200 while the additional computers (both
PC and notebooks) will have 10.0.0.20x depending which of them who
enter the network first.
One notebook and the PC can acces the internet at the same time without
problems.

The router can sometimes be accessed. Some times is show some thing
like (tranlated from danish):
Host not accessible
or
Answer from 10.0.0.1: The host is no accessible

Hope this help because I am lost. Spend way too many hours on this
project.

/Flemming Gravesen