Hi
You need to perform some configuration in your Google Checkout merchant account. Here are the instructions :
1. Your site need to support HTTPS (you need to purchase an SSL certificate for your site) .
2. Login to your google checkout merchant account .
3. Access to Settings tab, then Integration
- In the API callback URL textbox, please enter :
yourdomain.com/index.php?option=com_pmfo...od=os_googlecheckout
(Please remmeber to replace
yourdomain.com
to the real domain of your site) .
- In Callback contents, choose Notify as XML .
- In API version dropdown, choose version 2.
After that, everything will work as expected .
Regards,
Tuan