Royal Mail shipping - small problem

[TPHoare]

Have just installed Royal Mail shipping module on to 1.3.5 and it looks great, however, have one question.

The shipping estimator on the shopping basket page only appears to work if the user is logged in. Although we only ship within the UK I realise that it is necessary to know the destination details for the correct shipping to appear, but even entering country and county details from the drop down menus makes no difference.

We sometimes have customers who refuse to register or want to buy against an invoice but who would still find the shipping estimator useful.

Any views/advice welcome

[cadfc]

One possible solution is adding a message notifying your customers to call you to place their order if they don't want to register online, etc.