Hello, i'm currently having an issue whereby my column will not sort A to Z, Z to A with this one "Source Return" field.  The two other fields sort just fine, I'm assuming the reason this won't sort has something to do with the use of the "Unbound" control since that is the only visible difference.  Can someone tell me if there is something specific I have to declare to resume a sorting function with an Unbound Field please?  Thank you all so much.

<igDP:UnboundField Column="1" Row="0" Label="Source Return">       
       <igDP:Field.Settings>
        <igDP:FieldSettings CellValuePresenterStyle="{StaticResource TwoColumnStyle}" LabelWidth="125"/>
       </igDP:Field.Settings>
      </igDP:UnboundField>

      <igDP:Field Column="2" Row="0" Name="SourceClientID" Label="Source Client ID">       
       <igDP:Field.Settings>
        <igDP:FieldSettings CellValuePresenterStyle="{DynamicResource PfxDataGridTextFieldCell}" LabelWidth="125"/>
       </igDP:Field.Settings>
      </igDP:Field>

      <igDP:Field Name="FriendlyName" Column="3" Row="0" Label="Source Client Name">
       <igDP:Field.Settings>
        <igDP:FieldSettings CellValuePresenterStyle="{DynamicResource PfxDataGridTextFieldCell}" LabelWidth="125"/>
       </igDP:Field.Settings>
      </igDP:Field>