Error accessing Name Server Configuration

Hello,

I have installed WebAS 6.40 SP11 and deployed JDI SP11 on a single stand-alone machine, which is configured as Landscape and Name Server. When I try to access the Name Server Configuration in the DTR I get a "Server not found" error.

The URL is http://<server>:<port>/dtr/system-tools/administration/NameServerConfiguration

Where can I search for the reason? Any hints?

Regards,

Bjoern