Syndicate Not Working

[Paul Sal]

The Syndicate Link associated with a Blog Roll Feature of a Website does not appear to work:

http://davincispainting.com/blog/syndication.axd

Here is a screenshot of the Code on the Website:  https://clip2net.com/s/4ePgWMz

Here is my Feedburner Feed:

http://feeds.feedburner.com/feedburner/MtEi 

Here is a screenshot of the Feedburner Settings:

https://clip2net.com/s/4ePgCjG

This Pings Fine:

http://davincispainting.com/blog

This does NOT Ping Fine:

http://www.davincispainting.com/blog

I'm not clear if I need to complete another step for the syndication.axd.

Perhaps I need to re-create the syndication.axd?

I also enabled Feedburner Smartfeed to be sure to utilize RSS.

I would appreciate any help so I can get this working.

It simply stopped working a few months ago for no apparent reason