Plesk 12.x / Windows :: MySQL 5.5 - Unknown OS Charset

We have a special application that works on 3 servers, 1 of them is main server and others are mysql replicate servers basically used for generating reports or backups...

Server 1 - Centos 6.5/Mysql 5.5/Plesk 12
Server 2 - Centos 6.5/Mysql 5.5/Plesk 11
Server 3 - Server 2008 R2/Mysql 5.5/Plesk 12

Server 1->Server 2 replication works perfectly
Server 1->Server 3 replication sometimes fails with character issues (our database and tables use utf8_turkish_ci), when I tried to investigate this issue by logging in to mysql on Server 3 right after connection i saw "Unknown OS Character Set 'cp857' Switching to default character set latin1" and i am guessing that my replication issues are also related to this issue. I tried adding below settings to my.ini at "C:Program Files (x86)ParallelsPleskDatabasesMySQLdata"

[mysqld]
init_connect='SET collation_connection = utf8_turkish_ci'
init_connect='SET NAMES utf8'
character-set-server=utf8
collation-server=utf8_turkish_ci
skip-character-set-client-handshake
[mysql]
default-character-set=utf8
default-collation=utf8_turkish_ci
[client]
default-character-set=utf8
default-collation=utf8_turkish_ci

but didnt change anything, i was wondering if these settings were wrong so i tried them at my local wamp installation which i was having same error, but error was gone after adding them to my.ini so i think settings are alright...