Error Sending email with Outlook

Question

I'm trying to send email with Outlook. I've read the article "Sending Emails Through Outlook using C# and VB.NET" but when I try to get the Outlook.Application I get an error when I try to run it. //Error An unhandled exception of type 'System.InvalidCastException' occurred in OutlookTest.exe Additional information: QueryInterface for interface Outlook._Application failed. Here's what I do: //globals private Outlook.Application objApplication; private Outlook.NameSpace objNameSpace; //in a function objApplication = new Outlook.Application(); objNameSpace = objApplication.GetNamespace("MAPI"); objNameSpace.Logon(null,null,true,true); Outlook.MailItem objMailItem = (Outlook.MailItem)objApplication.CreateItemOutlook.OlItemType.olMailItem); objMailItem.To = "[email protected]"; objMailItem.Subject = "Test"; objMailItem.Body = "as dfkasjf a;sdfj ;alsdjf ;sadf"; objMailItem.Send(); I've also tried to do the same in VB but I get the same error. I'm using Visual Studio .Net 2003 with the Microsoft Outlook 9.0 Library. Does anyone have any idea of how to fix this?