That can happen if one of your map services is failing to load for some reason. You need to use a HTTP utility like fidler or charles and see if one of your services is failing to load.
That can happen if one of your map services is failing to load for some reason. You need to use a HTTP utility like fidler or charles and see if one of your services is failing to load.
So, it looks like it's one of my external layers.. it says "Layer type is not supported" when I open the Map Service into ArcMap from the below URL and analyze the map...