MySQL Encoding Problem

Hello,
Yesterday i ask my Host Provider to move my account to a server with PHP 5.2.6 and MySQL 5.0.51. Today the server was changed. But now i have a little problem. All my posts are now in “hieroglyphs”. The encoding of the site is on UTF-8 but i need some tool, plugins etc.. to fix the charters in the MySQL tables. My post are write on Bulgarian (Cyrillic, windows-1251).