Search:

Only this one if your cart is also at the root (public_html)

/public_html/index.html

So what do the debug logs say?

For blank page issues
http://www.zen-cart.com/content.php?124-i-am-getting-a-blank-page-%28or-blank-part-of-a-page%29

Use your account manager - cpanel 0r??
Check that you have created a database with that name & a user with that name

'carla907_carla');

'carla907_carlasbi_zc1'

Did you import a database...