RCDC Reference Delta Data Source

Hi Experts,

I am building a custom object and for the edit RCDC , I have taken the code from Group Edit RCDC.

and My delta datasource is of type ReferenceDeltaDataSource.

<my:ObjectDataSource my:TypeName="ReferenceDeltaDataSource" my:Name="delta" />

and my control is configured as shown below:

<my:Property my:Name="Value" my:Value="{Binding Source=delta, Path=MultiValRef.Remove, Mode=TwoWay}" /> 

When I open the resource and edit this attribute , I can able to see the changes in the summary page. But the value is not being updated  to the source.

Any suggestions please!!

I am stuckup here.

Thanks and Regards, Siva Kumar Balaguru