Fragment not working for Instance Data Container with property attribute

Hi…
I am having the following data context

<data>
      <instance id="orderDc"
                  class="com.company.entity.Order"
                  view="order-view">
            <instance id="costDc" property="cost"/>
            <loader/>
      </instance>
</data>

I have a fragment for the Cost entity. The fragment for the cost entity doesn’t automatically stores data.

<data>
        <instance id="costDc"
                  provided="true"
                  class="com.company.entity.Cost"
                  view="cost-view">
            <loader/>
        </instance>
</data>

The cost is always empty in the order entity…

Does the fragment doesn’t work automatically if the instance nested with in another instance…?

If not plz suggest me, how to solve this issue…

Thanks…

Any update on this…?