I have 2 sites that both use Viart. They're on different hosting using different databases. On one of them I can edit the shipping by click an Edit link next to the shipping method. I can't do this on the other site. Does anyone know a setting somewhere that will correct this?

I would check permissions on the site that doesn't allow it in the section for Order Permissions.

Thanks for your reply.
My user originally setup the Viart shop, on the page admin/admin_privileges_edit.php?privilege_id=1 (main administrator user type) all options are selected except a blank one under CMS Permissions and Add, Duplicate Coupons under XML Permissions.
Unless there's another permissions page somewhere I don't know about?