Free Shipping from a given amount

Hello, I want that in my shop shipping costs are free for orders over € 120.

I configured a shipping method manually, indicating as "minimum price" is set to 1, and "Maximum price" the value 120.

However, when I place an order worth more than 120, the system gives me the following error:

"The total is insufficient to purchase all available shipping methods"

And do not let me continue with the purchase. How I can set that do not add shipping costs if the order exceeds 120 € in total?

Thank you.

I answer to myself ...

What I have done is create another shipping method is as "minimum price" € 121, and "Maximum price" 6000 €. Then I put as "Price" 0.0000 €

Now I have two shipping methods, June 1 € from 1 to 120 €, and the other from 0 € from 120 € to 6000 €.

When you place an order from the online store and exceeds the amount of € 120, just get the free shipping method. If it exceeds, leaves the shipping method of payment.

Greetings!

Thanks for your feed back .