upgrading from 1.3.9f to h, admin pages missing data

I uploaded files for f to h and then uploaded all of the admin files from the 1.3.9h package when things went wrong.

Data is not being displayed in admin:

new customer names on admin home

customer name, addresses (but phone &email addresses are there) on orders.

product name, description on product info page

I'm buffaloed. Those are the first things I see gone but that may not be the extent of it.

Does anybody see a pattern with what's missing? Any guesses as to what I might have done?

Data is not being displayed in admin:

If you have an older version of php than php v5.2.3 ... you should review post #6 at:
http://www.zen-cart.com/forum/showthread.php?t=153143

Oh, my word. Not my server. Yes it's 4.4.9

Thanks so much for the quick answer.