Calling An Executable From Web Page

I want to call an Executable from a Web Page. I used the following code :

System.Diagnostics.Process.Start("c:\WINDOWS\system32\notepad.exe");

Works fine when executing (debugging) from Visual Studio. But when deployed as a website on IIS, the UI of the Notepad application is not seen. As it is executed as an anonymous user (Network Service in IIS 6.0) it is seen in task manager but cannot be seen as an executing application.

So now I applied Impersonation :

Code file (ASPX.cs File)
System.Security.Principal.WindowsImpersonationContext impersonationContext;
impersonationContext = ((System.Security.Principal.WindowsIdentity)User.Identity).Impersonate();
System.Diagnostics.Process.Start("c:\WINDOWS\system32\notepad.exe");
impersonationContext.Undo();
(Web.Config)
<authentication mode="Windows" />
<identity impersonate="true" userName="DomainUserName" password="password" />

In the application's virtual Directory in IIS go to properties and go to Directory Security Tab. In the Authentication and access controlclick Edit. Default Settings are: Enable anonymous access and Integrated Windows authentication are checked. This will give the following Error : An anonymous identity cannot perform an impersonation......................