JDBC to IDoc Mapping Problem

Hello,

I have a connection going from a SQL (via a JDBC connection), mapping into an IDOC. Connections all work, but for some reason when I turn on the communication channel to pull from the database through a SELECT statement, I only get the header of the Idoc (below). I have tried many different things and cannot see why the mapping does not seem to be working. When I load the test data as a test instance in the mapping, it works. Any help would be appreciated.

Thank you.

<?xml version="1.0" encoding="UTF-8" ?>

<CRMXIF_PRODUCT_MATERIAL_SAVE01 />