phpbb3 sql error

[Haki]

Pokusao sam ovo rijesiti stavljanjem hrvatskog jezika i sada mi prijazuje čćžšđž u imenu teme i u postovima ali nakon sto idem objaviti post pojavi mi se ovo (vidi dole).Shvatio sam da se nakon pisanje slova bez čćžšđ problem ne pojavljuje.


SQL ERROR [ mysql4 ]

Illegal mix of collations for operation ' IN ' [1271]

SQL

SELECT word_id, word_text FROM phpbb_search_wordlist WHERE word_text IN ('fnewnfojewfefčćžšđef', 'efefefđ', 'šćđćže', 'batman', 'pejgejgčžćđšć')

BACKTRACE

FILE: includes/db/mysql.php
LINE: 158
CALL: dbal->sql_error()

FILE: includes/search/fulltext_native.php
LINE: 1121
CALL: dbal_mysql->sql_query()

FILE: includes/functions_posting.php
LINE: 2361
CALL: fulltext_native->index()

FILE: posting.php
LINE: 1003
CALL: submit_post()