[twitter] error: PHP 5.3.0 or later requires

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /homez.682/bertrandm/www/wp-content/plugins/twitter/widget_twitter_vjck.php:77) in /homez.682/bertrandm/www/wp-content/themes/hades/header.php on line 8

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /homez.682/bertrandm/www/wp-content/plugins/twitter/widget_twitter_vjck.php:77) in /homez.682/bertrandm/www/wp-content/themes/hades/header.php on line 8
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