Html.DropDownList and Modeling

Why does model binding not work in DropDown?
What am I doing wrong?
To illustrate my problem, I did the following:

Created a new asp.net MVC project (beta1) Created the following class:

HomeViewData : ViewDataDictionary  
+List : SelectList

Added a view to the HomeController class, as shown below:

Homecontroller: Controller
+HomeViewData vd = new HomeViewData

The following lines have been added to my Home.Index () method

vd.list = new SelectList(new List<string>(){"test", "test1", "test2"});
return View("Index", vd);

And it will play the same method, but with a different signature to catch callbacks

[AcceptVerps(HttpVerbs.Post)]
public ActionResult Index(HomeViewdata d)

Here I added a breakpoint to the first line of code.
Then I added the following code to my Index.aspx

<%Html.BeginForm();%>
    <%=Html.DropDownList("List")%>
<%Html.EndForm();%>

, test1 test2.
( ) , . HomeViewData... NULL

, , , ...
- EDIT -
, :

• [ (Prefix = "")] , Phil
• [Bind (Prefix = ")], , " "