Virtuemart Shopping Cart Problems

Web site [login to view URL] Problem: The cart is using [login to view URL] and also [login to view URL] When an item is added to the cart the shipping cost will not show, but sometimes it does (on refresh). When there is no shipping cost or shipping method (the shipping method and cost should automatically show (this is the job that the shipping rules plugin does) and be shown in cart and added to total price which is not happening also) you cannot progress to payment as a shipping method needs to be chosen but there isn\'t one! Also in the checkout at the bottom there is a section where you can pick delivery city, date and time....this is not required and only confuses the shopper. It needs removing. I have installed these two plugins but I may have done it wrong! (possible jsquery issue). I need these two plugins working and configured correctly so the cart and checkout work. There are a list of post codes to be added to the advanced shipping rules once installed and configured. Kindest regards Paul