I'm really sorry here...I'm confused by your "list" reference and "pings".
Really...if you'd like to explain, I'd be glad to "listen". If not, that's okay too.
Thanks.
When you "post a reply", there are several other blue buttons to the right of that option. In the middle, there is one that says "to (with a post number)". If you click on that one, you will see the referenced post. AKA... a ping. (AKA = Also Known As).
FReegards,
DocRock