Unavailable Shipping method for non-registered customers

Hi,

I’m testing the plugin in it’s free version for setting the price deppending of the weight and zone of the client. It works perfectly for registered users, but when a new user try to buy something it appears that there’s no shipping methods available. I didn’t find anyone who has this problems, so must be any option I’m missing. Could you please have a look at it. The website is https://www.sumiprod.com

Thank you in advise.

Juan Fran