Process start is not working in iis i want to open file location path

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ASP.NET

Dim proProcess As Process
      Dim inStartInfo As New ProcessStartInfo
      inStartInfo.WindowStyle = ProcessWindowStyle.Normal
      'inStartInfo.FileName = Server.MapPath("Docs") & "\" & fileName5
      inStartInfo.FileName = "C:\inetpub"
      inStartInfo.Arguments = String.Empty
      proProcess = Process.Start(inStartInfo)

the above i had written in my asp project.
in source code it is working but in iis it is not working..

in iis application pool default pool.. process model
at identity column i made to local system
and
while adding virtual directory i added connect as i added one user i.e system userid and pwd but still all so not working..
any soulution