Combobox in GridView doesn't show values or even look like a drop-down

[Pavel]

This is odd, I am using the latest SP1 libraries and have followed all the steps and only see this in the WPF application. The Activities column should look like a drop-down combo box when the green checkbox is showing. Obviously, I am missing something, but not sure what it is. I hope I can look at it fresh in the morning and figure it out, but if there are tips, please let me know.

My XAML has this definition for the column:

<telerik:GridViewComboBoxColumn Header="Activities"
                                Width = "271" 
                                DataMemberBinding = "{Binding Description}" 
                                SelectedValueMemberPath = "SicCodeValue"
                                DisplayMemberPath = "SicCodeDescription" IsLightweightModeEnabled="true" IsComboBoxEditable="True">
</telerik:GridViewComboBoxColumn>

and I set up my itemssource via code using the following line on data load:

(this.myList.Columns[2] as GridViewComboBoxColumn).ItemsSource = (ViewModel as MyViewModel).SicCodes;

[Pavel]

Not sure why this showed up in the Kendo UI forum. Moving to the proper forum.