sitemde bi sayfayı actığımda ilk acılışında sayfada aşağıdaki hatayı veriyor.

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Warning:  include_once() [function.include]: Failed opening '/home/wwwivri/public_html/wp-content/plugins/maillist/' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/wwwivri/public_html/wp-settings.php on line 473

Warning:  session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/wwwivri/public_html/wp-settings.php:473) in /home/wwwivri/public_html/wp-content/plugins/pxsmail.php on line 1

Warning: Cannot modify header information - headers already sent by (output started at /home/wwwivri/public_html/wp-settings.php:473) in /home/wwwivri/public_html/wp-content/plugins/wp-super-cache/wp-cache-phase2.php on line 40

ama sayfayı 3-4 kere yenileyince düzeliyor.bunu nasıl hallederim yardım edin.