if you create a blank page and add a recordset to that page, can you reproduce the problem?
As a test, try removing the include files that you have at lines
<?php include_once("analyticstracking.php") ?>
<?php include("header.php"); ?>
<?php include("greysplit.php"); ?>
<?php include("leftcolmain.php"); ?>
<?php include("footer.php"); ?>
See if removing the includes clears the error. If so, put them back in one at a time and test the recordset again to pinpoint the include that is causing the problem.
This probelm has nothing to do with the DMX Zone issue.
The DMX Zone issue is fixed in Free Tools 1.0.9 and eCart 6.0.6
there will be an update to Data Bridge and design Extender that also fix the problem as well as the updated Configuration/Commands/installer_onOpen.htm file in the thread you linked to.