I am having some trouble with my membership plugin.

Hi, I am having some trouble with my membership plugin. Basically, I have downloaded the WPMU Dev Dashboard and have installed and activated the Membership plugin using the dashboard.

However, I can't seem to find the Membership tab on the left hand column. Also, when I click on "enable membership" in the message at the header, I'm redirected to a page that says "You don't have sufficient permission to access this page". I am logged on as the admin with administrator rights and I can't understand why I can't access it.

Can anyone help?

Thanks in advance!
Jia