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>