Shipping charges not adding to checkout page

[pantsuk]

I am using Virtuemart 2.026,

no matter which shipping modules I use the shipping charges are not being added to checkout and so orders are being accepted and payments taken without the shipping charges being added

I have checked settings in store shipping for all the shipping modules, - VMSHIPMENT PRO SHIP and VMSHIPMENT RULES

I have checked settings in the template and one page checkout Virtue Planet Supermart template and one step checkout

I have checked settings in Virtuemart / Configuration / Checkout

I notice that shipping methods are being chosen correctly and displaying correctly in checkout but the cost values are not being added to any orders placed

my site is www.pantsunderwearstore.com

Please help urgently