SSL and Domain Mapping with multisite

I have multisite installed with subdirectories, and the domain mapping plugin. I am trying to install a Standard SSL certificate to cover all the sites on my multi-site network. However, everytime I follow the directions on your article "How to Use One SSL Certificate for Your Entire Multisite Network", I get a failure message.

I have done nothing but pay for the SSL on Godaddy and have it assigned to the site. Do I need to download and install the SSL onto my wordpress install prior to following the directions about the domain mapping procedure?

Please help!

Thanks,

BigVan