The map draws blank when I try to add the Bing basemap. Firebug shows the error "this.spatialReference is undefined". The sample code does not show any spatial reference being defined, but I add it here since I have my own service added as well. Even if I remove the spatial reference I still get the same error. This is how the layer is added.var initExtent = new esri.geometry.Extent({"xmin":-13073942.51,"ymin":3898938.00,"xmax":-13039545.85,"ymax":3921869.10,"spatialReference":{"wkid":102100}}); map = new esri.Map("mapDiv",{ extent:initExtent }); //map = new esri.Map("mapDiv"); //Add the topographic layer to the map. View the ArcGIS Online site for services http://arcgisonline/home/search.html?t=content&f=typekeywords:service //var basemap = new esri.layers.ArcGISTiledMapServiceLayer("http://server.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer"); //map.addLayer(basemap); //Create Bing map to add to map veTileLayer = new esri.virtualearth.VETiledLayer({bingMapsKey: 'Aq6wyAehkpyMoyml9DNUcKN3YDVZ5oRbNwK0O--vJ2WJ7fAb0pC7VBX1VeRA6U9V', mapStyle:esri.virtualearth.VETiledLayer.MAP_STYLE_ROADS}); map.addLayer(veTileLayer); var dynamicTraffic = new esri.layers.ArcGISDynamicMapServiceLayer("http://50.18.218.190/arcgis/rest/services/publicAGS/trafficStatus/MapServer"); map.addLayer(dynamicTraffic);