Iis – How to allow IIS website user to execute .cmd program

I have a situation where I need to execute a .cmd program on my IIS website.
It's a 3rd party program to validate and transfer files, so I'm not able to choose otherwise.

I do this by starting the program in a new process programmatically.

Taking this approach with a .exe file works perfectly. I receive the standard output from the program. But this is just not the case when I try to do the same with the .cmd file. No standard output is received.

The code works perfectly on my local computer, so I figure that the problem lies within the IIS configuration. Probably user or file restrictions.

Could someone please guide me in the right direction?

EDIT Here is C# code I use.

    ProcessStartInfo info = new ProcessStartInfo(); 
    info.WindowStyle = ProcessWindowStyle.Hidden; 
    info.CreateNoWindow = true;
    info.FileName = AppDomain.CurrentDomain.BaseDirectory + @"export\foo.cmd"; 
    //replacing foo.cmd with foo.exe works
    info.UseShellExecute = false; 
    info.RedirectStandardOutput = true; 
    using (Process process = Process.Start(info)) 
    { 
        using (StreamReader reader = process.StandardOutput) 
        {
            string result = reader.ReadToEnd();
            Response.Write(result);
        }
    }