If you're able to login to the admin and you're able to use the storefront and do checkout properly with ssl (which all sounds very normal), then if your *other* setup doesn't do that, you've got a problem in one or more of your customizations.
So, you'll need to find that problem.
This is the concept you'll likely need to follow:
http://www.zen-cart.com/wiki/index.p...Obscure_Issues
Make and keep backups while you're at it.
Sometimes having a backup from 2 days ago, after discovering something's busted, can be a lifesaver.



Gads, I musta put my glasses down.

