eshop not showing shipping cost in profile

Seems my eshop is no longer applying the shipping charge after checkout.
If i place an order and go through the checkout process everything seems fine, postage is added and shows in the final price.
The email confirmations i recieve show a shipping charge of zero and when i login and check the ‘Orders’ page, it shows the product lists with price, but the shipping charge is zero.
Some assistance would be appreciated!
Many thanks!