You are shipping packages that weigh 0 pounds?

Defaults:
Shipping/Packaging
Title Value
Country of Origin your country
Postal Code your 5 digit zipcode
Enter the Maximum Package Weight you will ship 50
Package Tare Small to Medium - added percentage:weight 10:0
Larger packages - added packaging percentage:weight 10:0
Display Number of Boxes and Weight Status 3
Order Free Shipping 0 Weight Status 1
Shipping Estimator Display Settings for Shopping Cart 2
Display Order Comments on Admin Invoice 1
Display Order Comments on Admin Packing Slip 1