i have been pulling my hair out for 2 days and have now given up and asking for your help as the last resort.

Basicaly i am trying to get the google checkout to work with my zencart. it all looks ok if i use flat rate but as soon as i try zone based rate it just goes bananas and gives a zero for cost. the shipping rate works fine with other shipping methords. I have tried all cominations in the shipping genrater. I have changed all options in google checout incl CGI and i dont get any eroor message in the google checkout log at the other end.

also is it posiable to get the google checkout option after the customer has looged in without paying for SSL

site: http://dreamboxparts.com/shop

Images of error







Thanks for your help in advance