Guy,

What happens if you set the SelectedValue more like this:

SelectedValue="{Binding Action, Mode=Default}" />

Tim

>Hi Viv,
>
>I notice also that after having removed the SelectedValue section from the XAML, any changes I make to the select values in the combobox are not saved back to the business object (and database).
>
>:(
>
>Guy
>
>
>>Hi,
>>As posted I'd expect that to put some initial value in the ComboBox. Did you remove the
>>SelectedValue="{Binding Path=Action, Mode=TwoWay}"
>>?
>>
>>>I've tried that. Same results. :(
>>>
>>>
>>>>I'm not very familiar with MM but just maybe:

<ComboBox x:Name="cboActions" DisplayMemberPath="ActionName" SelectedValuePath="ActionCode"
>>>>           IsSynchronizedWithCurrentItem="True"></ComboBox>