Problems with MultiSite Domain mapping

I'm having problems getting domain mapping to work.

I'm not sure I fully understand the written documentation.

The main site soopllc.com is a multisite install.

I want wadefransson.com to map to wadefransson.soopllc.com.

Both wadefransson.com and soopllc.com are hosting on my clients GoDaddy account.

I've gone into the DNS and set an A record for wadefransson.com to point to the IP of soopllc.com.

I've gone into the wadefransson.soopllc.com site and set the domain mapping to wadefransson.com.

It's not working. It's still pointing to the old website. Did I miss something?