Going to HTTPS (SSL) is a multi-step process.
- Get your cert
- Check and fix any references to HTTP:
- Redirect any HTTP request to HTTPS.
Here are a couple of post that will help you.
SSL - Will old full links with "http" work in the new ssl environment?
http://forums.realmacsoftware.com/t/solved-redirect-http-to-https-please-read-before-posting/13503/5