I uninstalled the complete GMS server for nice clean install of GMS 201.
Installation was no problem, no errors, etc.
There was only one problem. In the administration console the server was in
a Disabled state.
I didn't find anywhere to enable the server. Strange problem.

So I uninstalled the complete GMS again and installed GMS 200.
So this works fine. After that I applied the GMS 201 an it still works.

Is GMS 201 only a update???