Marketpress theme compatability

Hi

I have no cart and now products showing at http://www.oldewatermill.co.uk/store

I think I am having the same issue as here;
https://premium.wpmudev.org/forums/topic/marketpress-not-working-with-caffiene-theme

Please can you advise if the problem is the same. I tried making a similar change but must have messed it up as it did not work.

Theme is Graphene. I have tried switching themes and confirm it was then OK

Please help.

Due to go live on Saturday with the commerce.

Thanks in advance

Stef