Google Checkout module for ZC 1.3.x (beta)

[g3steve]

Hi everyone,

Having an issue with GC and just cant get to the bottom of it. When i add anything to my cart i get:

Oops!
We were unable to process your request.

made sure my SSL is working and my merchant info is correct but still get the error, check GC console and see this error

<?xml version="1.0" encoding="UTF-8"?>
<error xmlns="http://checkout.google.com/schema/2" serial-number="71f3ff8c-f973-43b0-831e-5e0499******">
<error-message>We were looking for the parameter buyButtonCart, but we didn't find it in the cart post; check your form fields.</error-message>
</error>

Anyone know how to fix please?

Thanks in advance - Steve