Comunidad de usuarios de Drupal

He instalado el módulo url access para restringir el acceso a urls y me da el siguiente error:
Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 1142314 bytes) in /home/joxf7grk/public_html/includes/database.inc on line 200

Warning: Table 'watchdog' was not locked with LOCK TABLES query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (1, 'php', 'Table 'sessions' was not locked with LOCK TABLES\nquery: SELECT sid FROM sessions WHERE sid = '92cc98ae0d4c59e22b99db45371aa0f1' en la línea 172 del archivo /home/joxf7grk/public_html/includes/database.mysql.inc.', 2, '', 'http://www.salamancababes.es/admin/build/modules/list/confirm', 'http://www.salamancababes.es/admin/build/modules', '79.109.41.63', 1220664991) in /home/joxf7grk/public_html/includes/database.mysql.inc on line 172

Warning: Table 'watchdog' was not locked with LOCK TABLES query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (1, 'php', 'Table 'sessions' was not locked with LOCK TABLES\nquery: INSERT INTO sessions (sid, uid, cache, hostname, session, timestamp) VALUES ('92cc98ae0d4c59e22b99db45371aa0f1', 1, 0, '79.109.41.63', '0hfjkqkb4OQprKXFefQI_thz9bFGit4Z6caPREHkxsk5ZGmFyEpriMJBMhE4rV-fBZfhCFVS9RBKRTY-kog3eOwPfa4jgwbhKQoDCuUhfkqSGMtl2mkW72DA37kYXkCoFURXnLwWSROHHm8gRjuleTXK2ATES7MG0HXEihc5dAhCLyllo5MUv1b5Hit2LDhTAv2R4mVIIpWPCMSkx8DWqEZMaaCYCDqR60X5vv-TpTccefxOjZPxUnwtlsjJSF1ZCddQi-cLDXeWp8VcKRFytEurAchHs-Ip3hM9T9JFjtE53PNyjZqhPLGLqmmd7OymvaRg2UtPqIK4vOv3bPRjMKOmeAUjTxbwgCzEBZt7F0kkbuMIL9L-PCsvzzel5tUsc0oc0bSTvjbUNkwqir25msW5gCZ_FBI2fIbXgMQte4_lRhB55PeFPft6KyUJIxe6C9PowS8bMpDRcrU09wSNIEZ_FxsLR9Pav2NSj1o6kgb3NG7olbdZcVVQlBKY8y23Ne0dIVjQLIvaevN5s8yQ in /home/joxf7grk/public_html/includes/database.mysql.inc on line 172