Data binding with subforms and repeat subform for each data item

Hi -

I've searched the list and the web looking for an answer and can't find one.  I'm trying to get a repeated item set to work with LiveCycle designer 11.0.0.2 evaluation license.  I can create repeating elements when they are not nested but when I have a nested set of forms the "Repeat Subform for each Data Item" is greyed out.  Is there any way to have nested repeated data and have it work?  I'm using an XSD and XML data binding.  Any ideas would be most helpful.

thanks, Doug