Membership errors

Membership Plugin gives me this error in my php error_log:

[30-Jan-2012 05:04:08] WordPress database error Table 'edberryc_wrd1.wp_46_m_membership_relationships' doesn't exist for query SELECT * FROM wp_46_m_membership_relationships WHERE user_id = 1 AND sub_id != 0 made by require, require_once, include, get_header, locate_template, load_template, require_once, wp_head, do_action, call_user_func_array, feed_links, get_feed_link, apply_filters, call_user_func_array, membershippublic->add_feed_key, M_Membership->M_Membership, M_Membership->transition_through_subscription, M_Membership->get_relationships

This error may be related:

[30-Jan-2012 22:34:53] PHP Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 24 bytes) in /home2/edberryc/public_html/wp-includes/wp-db.php on line 1402

What can I do?