Hi all,

I'm having a bit of trouble with a Windows Service webbrowser object. It's attempting to load in values of username and password to a site but keeps failing and throwing the following error:

System.InvalidCastException: Specified cast is not valid. at System.Windows.Forms.UnsafeNativeMethods.IHTMLDocument2.GetLocation() at System.Windows.Forms.WebBrowser.get_Document() at MyWindowsService.MyDataProcessor.login()

The code that I'm using to make this call is:

MyWebBrowser.Document.All["Login"].SetAttribute("Value", username);
            MyWebBrowser.Document.All["Password"].SetAttribute("Value", password);
            MyWebBrowser.Document.All["submit"].InvokeMember("Click");

Any ideas as to why it keeps failing? Thanks in advance for the help.