WP Ecommerce Shipping

Help

I am having aprobelem with WP Ecommerce shipping. Despite forum posts to getshopped, the suppliers of the WP Ecommerce plugin I have had no responses whatsoever to my problem.

I cannot get the shipping module to work at all which renders the WP Ecommerce shipping plugin practically useless. I have tried all manner of setting this up but seem to get stuck in a loop where I cant add a postcode or get past the calculate shipping option.

The site is currently on a temporary domain at
http://79.170.44.80/jimmysfarm.com/

Can anyone on here shed some light on what is wrong with this or whether it can be rectified as I have been going round and round in circles for weeks. Getshopped seem like they are only interested in getting your money with no follow up or replys to forum posts or emails.

Thanks

John