I was having the same issue.
My scenario:
I have 2 932's in a home with a wireless router and that's it no computer on site or anything.
I have another 932 at my home.
At my home I am able to see and set my motion detection grid selections.
At the remote site via the D-Link link I cannot see any grid.
I believe you need to be on the network where the cams are in order to set the motion options or at least have a computer at that remote site that you can RDP or LogMeIn to, to access the D-Link settings site.
If anyone knows differently please post.
Thanks,
Bren