Component not registered - Google SDK

I am trying to use the Google SDK (version 2) to send Google a file for
indexing. The following code in my ASP.NET project returns a
"Component not registered" error on the third line:

const string RComponentGuid = "{3D056FE7-EA8E-481A-B18F-0B02EBF6B3C1}";
GoogleDesktopAPILib.GoogleDesktopClass gdsClass = new
GoogleDesktopClass();
object gdsEventDisp =
gdsClass.CreateEvent(RComponentGuid,"Google.Desktop.File");
IGoogleDesktopEvent gdsEvent = (IGoogleDesktopEvent)gdsEventDisp;
gdsEvent.AddProperty("content", "Some text from a file");
gdsEvent.AddProperty("format", "text/plain");
gdsEvent.AddProperty("last_modified_time",System.DateTime.Parse("3/18/2005
15:12:05").ToOADate() );
gdsEvent.AddProperty("uri", "somefile");
gdsEvent.AddProperty("title", "Test GDS File");
gdsEvent.Send(0x01);

Any help would be greatly appreciated.