Server Times Out with Membership Plugin Enabled

Hey guys, we just upgraded our entire userbase to a 1-month trial membership (about 1,000 users) and we're getting a 504 error on our Nginx webserver. We need help pinpointing the issue that is causing pages to be unable to load. Once I moved the membership plugin folder out of the plugins directory, everything snapped back into action really fast.

If someone can ping me on email or Skype, that would be helpful. chriswallace7 on skype and chris@liftux.com on email.

http://cl.ly/1I1P3y3k0N09032O2e31