I'm using entity framework classes as my datasource

The class is OrderDetail which have these properties:
ID (int)
Item(Class Item)
Quantity (int)
Subtotal (decimal)

Class Item has these properties
ID (int)
Name (string)

So i set the xamDataGrid.Datasource =  List(of OrderDetail)

I want to show the columns: Item.Name, Quantity, and Subtotal

So I specified 3 fields. I'm having problem setting the Field Name for Item.Name. "Item.Name" doesn't work, if I use that I get a blank grid.

Is this at all possible? I can easily bind "Item.Name" within a ListBox DataTemplate, how do I this with xamDataGrid.

Thank you