I cannot load a shapefile into the map control. Its not a standard scale, but when I use ZoomToScale method it still does not work even though it opens in my ArcExplorer tool with that scale.
Cannot upload shapefile
It is very common that the problem in cases like yours, when you don’t see the layer on the map, is due to the MapUnit of the map not being set or being set improperly. Check the unit of your shapefile from the projection information and set the MapUnit accordingly (Decimal Degrees, Meters or Feet). This is the first thing I would make sure.