Calling IEnumerator function with variables does not do anything

I'm trying to convert the HSController.js script from the wiki to C# and I'm having a bit of a problem. I have simplified the problem to this:

public void Start () { test("Jack"); }

public IEnumerator test(string MyName) { yield return new WaitForSeconds(1); Debug.LogWarning("My name is " + MyName);
}

What happens is that I don't get a log warning. When I remove the "MyName" property from the function, and just call "test();" it works.

Can anyone explain to me why? And how to solve this issue?

As I said, I'm trying to convert HSController.js to C#, which uses yield to wait for a high-score to be submitted to a PHP script. The function needs parameters as well (name, score, etc...). The JS script works fine, but in JS I don't have to work with IEnumerator.

Thanks in advance.