Domain Mapping not allowing purchase

I am trying to allow customers to purchase domains through my site, I have a reseller account through enom all set up.

My user can go to their control panel, search for an available to domain and go to click purchase domain. After clicking purchase the user is sent to I get the following error code in chrome:

You are not authorized to access the webpage at You may need to sign in.
Error code: 403

I think I have done everything right. Is the plugin not working? Thanks. Using wordpress 3.8