Chat login

When a user registers as a subscriber on our WP site and subsequently logs in, it seems they need to log into the chat separately to participate. Also, they can't use the email they used to register to our WP site for the chat since it returns an error message saying "Email already registered. Try something unique." Is there a setting that I can adjust that allows users who have logged into the WP site as subscribers to automatically be logged into the chat?

We are using WPMU DEV Dashboard version 4.1.0. I've recorded a video
displaying the issue I'm talking about.

http://screencast.com/t/zmnu1OPt

This is a time sensitive issue, as we have a webinar coming up on 7/27 and
need the chat functional before then.