diff --git a/include/config.php b/include/config.php
index 33e93827..955d75c7 100644
--- a/include/config.php
+++ b/include/config.php
@@ -401,7 +401,7 @@ $SUBSPATH = "subs";
 //Make sure you have wget installed on your OS
 //replace "http://www.nexusphp.com/" with your own site address
 
-$useCronTriggerCleanUp = $MAIN['use_cron_trigger_cleanup'];
+$useCronTriggerCleanUp = config('use_cron_trigger_clean_up', false);
 //some promotion rules
 //$promotionrules_torrent = array(0 => array("mediumid" => array(1), "promotion" => 5), 1 => array("mediumid" => array(3), "promotion" => 5), 2 => array("catid" => array(402), "standardid" => array(3), "promotion" => 4), 3 => array("catid" => array(403), "standardid" => array(3), "promotion" => 4));
 $promotionrules_torrent = array();
diff --git a/include/functions.php b/include/functions.php
index 259aabd3..579f9d1e 100644
--- a/include/functions.php
+++ b/include/functions.php
@@ -1752,15 +1752,14 @@ function getExportedValue($input,$t = null) {
 
 function dbconn($autoclean = false, $doLogin = true)
 {
+    global $useCronTriggerCleanUp;
     \Nexus\Database\DB::getInstance()->autoConnect();
-
 	if ($doLogin) {
         userlogin();
     }
-
-//	if (!$useCronTriggerCleanUp && $autoclean) {
-//		register_shutdown_function("autoclean");
-//	}
+	if (!$useCronTriggerCleanUp && $autoclean) {
+		register_shutdown_function("autoclean");
+	}
 }
 function get_user_row($id)
 {
diff --git a/lang/chs/lang_settings.php b/lang/chs/lang_settings.php
index b44820f5..18d56376 100644
--- a/lang/chs/lang_settings.php
+++ b/lang/chs/lang_settings.php
@@ -680,8 +680,6 @@ $lang_settings = array
 	'text_email_notification_note' => "是否允许用户在收取新短讯、评论等时候收到邮件提示。",
 	'text_users_get' => "首次升级至此等级的用户将获得",
 	'text_invitations_default' => "个邀请名额。默认",
-	'row_use_cron_trigger_cleanup' => '使用定时器进行清理',
-	'text_use_cron_trigger_cleanup_note' => '确保已经配置好定时任务',
 	'row_logging' => '运行日志路径',
 	'text_logging_note' => '请填写你的运行时日志路径',
 );
diff --git a/lang/cht/lang_settings.php b/lang/cht/lang_settings.php
index 282ddaf1..8dd1745b 100644
--- a/lang/cht/lang_settings.php
+++ b/lang/cht/lang_settings.php
@@ -680,8 +680,6 @@ $lang_settings = array
 	'text_email_notification_note' => "是否允許用戶在收取新短訊、評論等時候收到郵件輔助說明。",
 	'text_users_get' => "首次升級至此等級的用戶將獲得",
 	'text_invitations_default' => "個邀請名額。預設",
-	'row_use_cron_trigger_cleanup' => '使用定時器進行清理',
-	'text_use_cron_trigger_cleanup_note' => '確保已經配置好定時任務',
 	'row_logging' => '運行日誌路徑',
 	'text_logging_note' => '請填寫妳的運行時日誌路徑',
 );
diff --git a/lang/en/lang_settings.php b/lang/en/lang_settings.php
index 6dba6828..a03fddb8 100644
--- a/lang/en/lang_settings.php
+++ b/lang/en/lang_settings.php
@@ -680,8 +680,6 @@ $lang_settings = array
 	'text_email_notification_note' => "Allow users to receive email notification when he gets new pm, comment, etc.",
 	'text_users_get' => "Users would get ",
 	'text_invitations_default' => " invitations the first time he is promoted to this class. Default ",
-	'row_use_cron_trigger_cleanup' => 'Use cron trigger cleanup',
-	'text_use_cron_trigger_cleanup_note' => 'Make sure have configure crontab job',
 	'row_logging' => 'Runtime log path',
 	'text_logging_note' => 'Please enter your runtime log path',
 );
diff --git a/public/settings.php b/public/settings.php
index a6f62dcf..f319dda1 100644
--- a/public/settings.php
+++ b/public/settings.php
@@ -625,7 +625,6 @@ elseif ($action == 'mainsettings')	// main settings
 	tr($lang_settings['row_torrent_directory'], "<input type='text' style=\"width: 100px\" name=torrent_dir value='".($MAIN["torrent_dir"] ? $MAIN["torrent_dir"] : "torrents")."'> ".$lang_settings['text_torrent_directory'], 1);
 	tr($lang_settings['row_bitbucket_directory'],"<input type='text' style=\"width: 100px\" name=bitbucket value='".($MAIN["bitbucket"] ? $MAIN["bitbucket"] : "bitbucket")."'> ".$lang_settings['text_bitbucket_directory_note'], 1);
 	tr($lang_settings['row_torrent_name_prefix'], "<input type='text' style=\"width: 100px\" name=torrentnameprefix value='".($MAIN["torrentnameprefix"] ? $MAIN["torrentnameprefix"] : "[Nexus]")."'> ".$lang_settings['text_torrent_name_prefix_note'], 1);
-	yesorno($lang_settings['row_use_cron_trigger_cleanup'],'use_cron_trigger_cleanup', $MAIN['use_cron_trigger_cleanup'], $lang_settings['text_use_cron_trigger_cleanup_note']);
 
 	tr($lang_settings['row_save_settings'],"<input type='submit' name='save' value='".$lang_settings['submit_save_settings']."'>", 1);
 	print ("</form>");