No delivery method update in the checkout page

Hello again.
I have the folllowing problem:
I have 2 delivery methods in my store: free self pickup and delivery (min. buy of 150).
I added couple of products (total sum less than 150) to the cart, and began a checkout. Only "self pickup" showed up in the checkout page, as it's supposed to be. Then I changed the number of items and clicked on the refresh button. Number of items and totals were updated (more than 150), but only "self pickup" showed up.

I have to say that your support in this forum is exellent-fast and acurate.

Thank you,it worked.
I must send weight AND include virtual prices