i activate wp-cron, but give me the error :
Warning: include_once(wp-cron.php) [function.include-once]: failed to open stream: No such file or directory in /home/.jonquil/likeatoy/hellkeyhole.com/wp-content/plugins/link-trade-1.00-mainstream/link-trade.php on line 461
Warning: include_once() [function.include]: Failed opening 'wp-cron.php' for inclusion (include_path='.:/usr/local/php5/lib/php') in /home/.jonquil/likeatoy/hellkeyhole.com/wp-content/plugins/link-trade-1.00-mainstream/link-trade.php on line 461
WordPress database error: [You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1]
SELECT link_id FROM wp_links WHERE link_name = 'Add Link' AND link_category =
WordPress database error: [You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'AND link_visible = 'Y'' at line 1]
SELECT COUNT(*) FROM wp_links WHERE link_category = AND link_visible = 'Y'
WordPress database error: [You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'AND link_url = 'http://ii55.com'' at line 1]
SELECT link_id FROM wp_links WHERE link_name = 'ii55' AND link_category = AND link_url = 'http://ii55.com'
WordPress database error: [You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1]
SELECT link_id FROM wp_links WHERE link_name = 'Add Link' AND link_category =
WordPress database error: [You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'AND link_visible = 'Y'' at line 1]
SELECT COUNT(*) FROM wp_links WHERE link_category = AND link_visible = 'Y'