I installed "Ultimate SEO URL V 0.6.0" then i did this
replacments for show Turkish chracter on links, everthing was ok.
Then i installed "No Duplicate" to show last topics name on index.php, and i activated on acp but after that Turkish characters have disappeared (i upgrade htaccess and resync messages). When i try open new topic with Turkish character, there is no problem, but old messages dont contain Turkish characters.
sorry for my mistake, it is "no dublicate"