C# .NET - Google Map KML file in Asp.Net

I am creating KML file for google maps, and the file is generating properly in the same directory. But When I use it in my page, it doesn't show proper map.

Here is my code in javascript 

function init()
                {
                    if (GBrowserIsCompatible()) {
                    
                    geoXml = new GGeoXml("http://localhost:1546/Website1/myKML.kml");
                    //geoXml = new GGeoXml("http://www.spencerwilliams.net/kml/kmltest3.xml");
	    map = new GMap2(document.getElementById("map_canvas"));
                    map.setCenter(new GLatLng(0,0),0);      
                    map.addControl(new GLargeMapControl());
                    map.addControl(new GLargeMapControl());
                    map.addOverlay(geoXml);
                    map.setCenter(geoXml.getDefaultCenter()); 
                    geoXml.gotoDefaultViewport(map);
                  }
                }

This function is being called on Body's onload event.

When I used following statement in it, the map was showing proper locations.

//geoXml = new GGeoXml("http://www.spencerwilliams.net/kml/kmltest3.xml");

Can anybody guide me further please, Peter sir and Mr. Robbe Morris?

Thanks in Advance..