RSS Feed Problems

Just installed two new blogs about one month ago (v.2.8) I am using the SAME RSS feed for both blogs, but it will not display on one. What could the problem be & how do I fix it?

This RSS Feed works (RGJ Latest Updates) http://rgj174.wordpress.com/
This one DOES NOT (RGJ Latest Updates)http://rgjdelivery.com/

Point is I want to close up the self-hosted one, and use the .org one.