Running Latest Zen-Cart on RHEL5 with latest MySQL etc....

Everything installed just fine and I can get to Admin and Shopping cart on the Linux box itself. However, when trying to access the same using a different computer on the LAN, I get either a blank page or cannot be found.

Installed to /var/www/html/Zen and all files and folders are under Zen. I tried to copy the index.php over to /var/www/html but no dice. Renamed the index.php to index.html and got the actual text within the index.html/php file.

If I leave the /var/www/html folder empty, I do get the Apache welcome screen.

What might I be missing?

Thx