2Checkout Questions

Is anybody running the membership plugin right now with 2co as the payment gateway? When I try to register a new user, I get to the subscription page and get the message:

"There was a problem connecting to 2CO. Please try again."

Now, my 2CO account status is still in Demo Mode, which is when you've signed up but you haven't submitted the application yet. Would that cause the problem or should I still be able to run my testing site with my 2co account in demo mode? I still have all the items asked for in the plugin panel ( username, password, id, secret word, etc.).

-Chris