Authorize.net integration problem

When I activate the authorize.net membership gateway my client sign up page fails to load

the url that is attempted to be loaded is: https://www.usmg1.com/client-login/
my client signup page: http://www.usmg1.com/client-login/

During the live support yesterday it was suggested that I get an ssl certificate which I did and I have requested and recieved it through my host and godaddy. What else can be causing this issue? Is thier a setting that I need to change in authorize.net or in membership?

I am getting an unable to load timeout not a 404 redirect.

Any help would be greatly appreciated.

Joe