Piwik on a Yahoo Store

I have Piwik hosted a seperate server and am trying to track ecommerce data a site I have hosted on the yahoo store platform. While all the general stats are collected normally, nothing is being collected in regards to ecommerce. Anyone have experience with this or thoughts?

To make the question more broad: How would you track a shopping cart that’s hosted on seperate domain?

You can use the Tracking API to track “After the fact” but if you cant put the piwik beacon on the other website it will not work.