MVC Routes Rest Standards URL Parameters

I have the following controller actions:
<HttpGet()>
Function News() As ActionResult
End Function
<HttpGet()>
Function News(ByVal id As Integer) As ActionResult
End Function

I want it to be smart, and go to the first if I have no ID in the url, and the second if there is. I got the following error:
The current request for action 'News' on controller type 'MarketsController' is ambiguous >between the following action methods:
System.Web.Mvc.ActionResult News() on type TradeChaseMVC.MarketsController
System.Web.Mvc.ActionResult News(Int32) on type TradeChaseMVC.MarketsController

So, I thought if i explicitly created routes without the id parameter optional, like this:
routes.MapRoute( _
"Default2", _
"{controller}/{action}/{id}",
New With {.controller = "Home", .action = "Index"},
New With {.action = "^[a-zA-Z_]+$", .id = "d{1,8}|"}
[Code] .....

It would work, but it doesn't same error. Now I know the simple solution is to call my methods different things, but i don't want to do this. I was also thinking of creating an attribute to prefix the ID method, to check for ID being there, and if it isn't dont allow that method, but I can't get this to work either.