RelativeSource Binding inside EventTrigger not working

[Sameer]

Hi,

I have a RadDropDownButton whose dropdown content contains Border and a RadButton inside that border.

I have attached a EventTrigger on Click event of the RadButton like this

<i:EventTrigger EventName="Click">
          <ei:ChangePropertyAction
          TargetObject="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=telerik:RadDropDownButton}}"
          PropertyName="IsOpen" Value="False"/>
</i:EventTrigger>

Basically, I want to close the dropdown on click of this button.

FYI: If I specify Elementname in my TargetObject binding, it works fine. But this will defeat the whole purpose of Templates.

Thank you for your help

Sameer