Domain Mapping resolves to cPanel splash page.

Hi,
I've trying to make this plugin work off and on now for a couple of years. Been making lots of mistakes but think I have it this time!

I have mymultisite.com installed on a dedicated IP on a VPS. When I browse to the IP it goes to the Create New Blog page with the IP address as the name of the new blog.

I installed and actived Domain Mapping according to directions, I hope. I then created "A" record at newdomain.com with the mymultisite.com IP, and added newdomain.com in domain mapping settings at subsite.mymultisite.com.

I allowed 12 hours to propigate. When I browse to newdomain.com I get a cPanel splash page (your site is being created). When I browse to subsite.mymultisite.com it returns "newdomain.com not found".

Any suggestions? Thanks.
Chuck S.