Domain Mapping Plug in is not working with digital downloads

I'm using the wpmuDEV Domain Mapping Plugin while it works for everything else It doesn't work for Digital Downloads With a Premium Press Theme I'm using (Shoppers Press) I have a A name mapped to my IP of the Server and its a Dedicated IP of the main site.
The Add on site (2) of them map Fine But the Digital Download part is not working Can anyone think of what would stop it. When some one clicks the download link for digital downloads it redirects to the main page.
I want to make sure its not the Plug in while I still wait on their support to get back to me.
Can it be the theme or Plugin?

(I had to pick dashboad because for some reason the Domain mapping plugin is installed but not being picked up here) (Please move this to domain mapping Plugin section)