Hi All totally new to Zen so Hello!

Having installed Zen I noticed when I put a test product through I get the following error message at the checkout/login
" Country:
WARNING: An Error occurred, please refresh the page and try again."

I note on other sites that the checkout process has more details to fill in , mine has not.
I have tried looking on the forums but cannot find a solution

Im presently using: v1.5.5 with the Duotone Gray/Blue Template. However I have tried swamping to other templates but still the same problems.
my website url is http://www.reenactorswarehouse.com.au/
Thank you in advance

Rich