Problem with Checkout and Shipping Estimator

[Sweet ZouZou]

I have loaded several mods listed below. Unfortunately my shipping estimator and the checkout link hang. I have tried several paths to fix this problem. Reinstalled the whole site from my back up, Uninstalled the Super Orders and Fast and Easy Checkout mods; Reinstalled both mods, then one then the other.

Is there a way to track where the program is hanging? Trace the path as it were? I would love to go back to where I was a few days ago but the uninstall mods and reinstall backup files doesnt work.

Thx Sweet

www.sweetzouzou.com

Mods: about_us_page; Automatic Login; Column_Layout; Easy_Rollovers; Lightbox; Nifty Zen; Product_Info_Display_Centered; Tabbed_Products; Super Orders; Fast and Easy Checkout

[Sweet ZouZou]

I also added Ty_Package_Tracker.

[Sweet ZouZou]

I found the problem (operator error). When installing Super Orders the file purchaseorder.php is supposed to be installed in the includes/languages/english/modules/payment directory and I put it in the includes/languages/english/modules/payment/Sweet ZouZou directory. My shipping estimator and checkout now work.