XML View Field not working

Ok, here is the situation that I am trying to solve: I have two different content types - one that holds a media resource (think kind of like a TV program), and another content type that holds the different bit rate and resolution options available. My goal is to generate an XML file that contains the program information, with more XML detail on the actual bitrates for that particular program.

At the moment, I have two views (media_streaming_files and media_streaming_files_detail) that generate the appropriate XML information. One generates the parent information - and the other generates the detail information. Both views work fine individually. The challenge, however, is that in the parent view (media_streaming_files), it never seems to trigger the child view (at the moment, I have it set to write "empty" if there is nothing in it - and that is all that I ever seem to get).

I have tried (I think) just about all the different options trying to find the magic combination - but so far, I am having little luck.

I am a bit new to Drupal - so I am probably just doing something stupid - but any help that is available would be greatly appreciated.