Need help with installing Citrix Access Essentials 2.0, no HTTPS

I've got CAE 2.0 installed okay so far on Server 2003 R2, but I don't want to pay for any support yet, until I really have to.

I can't get HTTPS to work, which is the main reason to use Citrix. HTTP works okay (both internally AND externally), but SSL can't reach the login page. The IIS 6.0 logs HTTP on port 80, nothing on HTTPS 443, so I don't think I'm getting to the web server.

The router and firewall seem to be set up correctly, with 80 and 443 going to the Citrix default website (the only website on this server).