I have a customer looking to make a purchase, but wants to estimate the shipping first. Shipping estimator is not working!

Can someone direct me to the files that need to be checked out to fix the shipping estimator - It returns NO information whether logged in or not.

I've looked at the files returned from a developers tool search for shipping_estimator and compared them to a fresh download of Zen Cart ver 1.3.8 (same version as site) and am finding no differences!

Any suggestions where to look next???

TIA,
Tina