I've used Combos inside datagrids a lot and never had any problems but for some reason on this one page it doesn't. When I try to change the entry I get a cellendedit event but the cell stays selected and shows a thin red line around the outside. I can't open any other combobox in the display either. I populate it with an enum converted to an observable list and bind the column to a datatable.

Code:
    Public Enum ItemTypes As Integer
        ignore
        Products
        Ingredients
        Consumables
        Taxation
        Equipment
        Utilities
        Maintenance
        Rentals
        Monthly
        Other
        Last
    End Enum
Code:
   Public Function GetSubTypesCollection() As ObservableCollection(Of ItemsClass)
        Dim col As New ObservableCollection(Of ItemsClass)
        For i = 4 To ItemTypes.Last - 1
            Dim entry As New ItemsClass([Enum].GetName(GetType(ItemTypes), i), i)
            col.Add(entry)
        Next
        Return col
    End Function
Code:
       Dim cbCol = New DataGridComboBoxColumn
        cbCol.Header = "Type"
        cbCol.ItemsSource = GetSubTypesCollection()
        cbCol.DisplayMemberPath = "Name"
        cbCol.SelectedValuePath = "ID"
        cbCol.SelectedValueBinding = New Binding("typeid")
        cbCol.Width = New DataGridLength(1, DataGridLengthUnitType.Star)
        dg.Columns.Add(cbCol)
The only thing I can think of would be that the selectedvalue is something the datatable doesn't like. I msgbox() the entire collection and made sure it was just integers though (typeid is an integer column too).
Oh the datagrid declaration!
Code:
            <DataGrid Name="dg" Grid.Row="0" Grid.Column="0"  IsReadOnly="False" CanUserAddRows="False" CanUserDeleteRows="False" AutoGenerateColumns="False"/>
I am about to erase and redo it all but I'm hoping someone can spot my error