Membership plugin not working

Please please help!!

I have built a site for a client: http://www.socialmediashop.co.uk

The client has 12 levels of membership (!) so I have to use the premium plugin rather than the lite one. I think it’s all set up ok and is activated. it’s version 2.1.2

Burt it’s not working. For example, if you log in as Anco with password clavier6 you should have access to level one (link in the sidebar) but you get the Access Denied page. I have set level one to show all page except those marked level 2 and 3 – so it should work.

The client is going nuts at me about this and I really need to get it working today. I’m happy to send an admin access so you can check the settings. Please help!