1 Make sure in Modules ... Order Total ... that the Shipping ot_shipping is installed

2 Set the Allow Free Shipping to: false

3 Free Shipping Over, it does not matter as Free Shipping is not enabled on the Shipping ot_shipping any more

4 On destination option, it does not matter as again Free Shipping is not enabled on the Shipping ot_shipping any more

Shipping Cost 0.00
Handling Fee 0
Total >= 100.00
Total <= thru Item Count <= are blank
Tax None
Tax Basis Shipping
Shipping Zone 48 Contin
Sort Order 1
So this is saying for any Order of $100.00 or more, for anyone shipping in your Zen Definition DETAILS for 48 Contin give the Free Shipping ...

What are you doing on shipping for anything < $100.00 or someone NOT shipping to somewhere not in your Zone Definition DETAILS for the 48 Contin?