pay atention to this part of the error message:
output started at /hermes/bosweb26b/b2452/ipw.thewealthquestcom/public_html/download_Center.php:5
this is telling you to look at lines 4 and 5 of the download_Center.php page for the cause of the error.
the most likely cause is a blank space at the end of the closing php tag:
"?> "