Hi @joshuaiz,
Greetings and thanks for posting on the forums.
I think you are using the pro version of Membership plugin and no this free version.
We are dealing this issue on the following thread.
http://premium.wpmudev.org/forums/topic/membership-account-not-being-created-with-subscription
WordPress.org discourages support of commercial products here (see: Commercial products are not supported here) so let's deal with the issue on the above thread closing this one.
Cheers,
WPMU DEV