hook filter after the_content on a specific page

get_the_content do not apply the_content filter. You have to apply it after receiving contents like following

<?php apply_filters('the_content',get_the_content( $more_link_text, $stripteaser, $more_file )) ?>

It is also detailed at the bottom of codex page

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)