Telerik MVC DropDownList not binding to model property

I have the following DropDownList in a Create view.开发者_如何学C I populate the list dynamically, cascading from two other lists, and all goes well before posting. The list populates correctly and I select a suburb. However, on the model passed into the Create action method, SuburbId remains null. What is going on here?

<div class="editor-field">
    @(Html.Telerik().DropDownListFor(model => model.DetailItem.SuburbId)
        .Name("Suburbs")
        .Enable(false)
    )
</div>

(DetailItem is a property on the view model that holds a reference to the data model.)

Thanks to @korchev's suggestion above, I removed the Name call, which was actually assigning an explicit name in conflict with the DetailItem_SuburbId name generated and assigned by the model binder.