Basic pages not displaying

[Per Mutations \(Newbie\)]

System:
XP Pro
IIS5.1
ASP.Net SDK 1.1
Applied Mobile Device Update

Problem:
Have just started asp.net mobile coding and getting .wml files to display ok
in phone simulators.

However, I cannot get even basic .aspx files to display in either
MME3.0(Unable to display content) or
OpenWave Phone Simulator 6.2.2 (just displays source code).

Example of basic .aspx file:

<%@ Page language="c#"
Inherits="System.Web.UI.MobileControls.MobilePage" %>
<%@ Register TagPrefix="Mobile"
Namespace="System.Web.UI.MobileControls" Assembly="System.Web.Mobile"%>
<mobile:Form id=Form1 runat="server">
<mobile:Label id=Test Runat="Server">Hello, Mobile World</mobile:Label>
</mobile:Form>

I do not have Visual Studio so I am using notepad to create the files.

Is this a configuration problem, device adapter problem or what?

Any help would be appreciated.

TIA

Per