configuration of .htaccess for add_rewrite_rule to make sense

after adding a new rule, you have to flush the rewrite-rules in order to use them

that can be done with the “flush_rewrite_rules” function
http://codex.wordpress.org/Function_Reference/flush_rewrite_rules

or it can be done in going in the Administration Screens -> Settings -> Permalink and just saving without changing something on this screen

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