Cannot install Membership Premium and a question about WooCommerce

Question 1:

During install, I get the following error:

"An unexpected error occurred. Something may be wrong with or this server’s configuration. If you continue to have problems, please try the support forums."

Should I maybe try upgrading WP to 3.5? However, I've had quite a few themes break on me recently during upgrade so I'm slightly reluctant to do this until a theme update is available. (The site is currently running Akita by Theme Boulevard).

Question 2:

The site is also running WooCommerce and one of the 'pages' I wan't to make protected (members-only) content is the main shop page. Is this possible? I installed Lite to try this out and the shop page didn't appear in the list of pages to protect...

Many thanks,