Problem solved!
Thanks for help, guys.
The culprit was a misunderstanding in using WiFi.
I had connected the PC into the GS911 WiFi or using USB. This was not enough. One has to connect the PC and the GS911 to a WiFi network where there is a connection to Internet. Those functions I was looking for are available through Internet only.
This was more or less described in the manual with many other combinations, device types, connection types. Should have read more and more carefully. On the other hand the manuals could have more clearly structured documentation.
Anyway, everything in order.
Thanks,
Harri