Hi vanchok,
Please check if in your server.xml (Knowage-Server/conf/server.xml), the line
<Connector connectionTimeout="20000" port="8080" protocol="HTTP/1.1" redirectPort="8443" URIEncoding="UTF-8"/>
has the URIEncoding="UTF-8". It can make the trick...
Please tell me if it worked for you.
Best regards,
Giovanni