shell command not working on live

Following is my code and not working on iis. But working on local.
This code is to convert up file to wav file and play after.

It convert and store audio file on local but not on IIS

public void ExecuteCommandSync(object command)
   {
       try
       {
           string exepath;
           string AppPath = Request.PhysicalApplicationPath.Replace("http:\\", "");
           ////Get the application path
           //exepath = Server.MapPath("Up2Wav.exe");
           exepath = Server.MapPath("tmp/Up2Wav.exe");
           string strCmd = exepath + " " + command;
           StreamWriter _testData = new StreamWriter(Server.MapPath("data.txt"), true);
           _testData.WriteLine(strCmd);


           System.Diagnostics.ProcessStartInfo procStartInfo =
               new System.Diagnostics.ProcessStartInfo("cmd", "/c " + strCmd);
           // The following commands are needed to redirect the standard output.
           // This means that it will be redirected to the Process.StandardOutput StreamReader.
           procStartInfo.RedirectStandardOutput = true;
           procStartInfo.UseShellExecute = false;
           // Do not create the black window.
           procStartInfo.CreateNoWindow = true;
           // Now we create a process, assign its ProcessStartInfo and start it
           System.Diagnostics.Process proc = new System.Diagnostics.Process();
           proc.StartInfo = procStartInfo;
           proc.Start();
           // Get the output into a string
           string result = proc.StandardOutput.ReadToEnd();
           // Display the command output.
           Console.WriteLine(result);
           _testData.WriteLine(result);
           _testData.Close();
           _testData.Dispose();

       }
       catch (Exception objException)
       {
           // Log the exception
       }
   }

Tags: C#, ASP.NET