shell command not working on live

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
       }
   }