Custom Domain Mapping

I have everything setup in my multisite. I'm trying to map to a custom domain. Here is my setup:

My Domain Mapping settings: http://screencast.com/t/lN5iPKp1jj5p
My DNS settings: http://screencast.com/t/Qpjvo6sIxf

Not sure what I'm doing wrong. When I hit 'Map domain' on the first screenshot, I get the following: http://screencast.com/t/Z1GdFQygS

Any assistance is appreciated.