I have been using the TopoWMS tilesets without difficulty until today, when I could not get the finer maps to load and began getting a "Topofusion is having trouble contacting one or more of its map servers" popup message. And "Map Downloading" kept getting toggled off. So I tried to switch to the "Topo..." tileset using the Tileset selector on the toolbar line. I can get a display at the Topo16M level but when I try to go to a smaller scale I just get the "Downloading Checkmark" images displayed - and after awhile I again get the popup and "Downloading Disabled" appears. My internet connection is OK and I have not made any Topofusion changes since my last usage, except for the tileset change. Is the problem truly at the server (in which case others should also be having problems) or really at my PC? Can I be sure that I am now really using "Topo4M" server rather than my previous TopoWMS server?