jdMorgan - 1:21 pm on Jul 12, 2011 (gmt 0)
To use SSL, the secure domain (or subdomain) must have a unique IP address, as stated in your host's message. To move this thread along, I'd suggest that you comment on this subject: Do you or do you not have a unique IP address for your "secure site"?
The reason that a non-shared/unique IP address is required is that SSL requests are encrypted from the very start of each HTTP request -- you can't even connect to the server if the request is made using HTTP instead of HTTPS (you cannot do a redirect from HTTPS to HTTP or any internal rewriting, or anything else, because no connection will be established if the protocol is not HTTPS). Therefore, once SSL is enabled, all requests to that IP address must be encrypted. So, if you were to try to share the IP address, then the entire site (i.e. entire server) would be SSL, and unless all of your domains and subdomains were set up for SSL, then you would likely "lock out" most of your users from all domains and subdomains that you attempted to share the IP address among.