[otrs] ISO-8859-1 to UTF-8 in Autoanswer messages

Good day. There is a problem when I use autoanswer feature for My Queue. I send mail into queue in UTF-8 codepage (Russian Language), autoanswer return message to my inbox with "You wrote: " But reply in ISO-8859-1 codepage and i have unreadable text in message... and as result history tree of answers to Customer is unreadable... How can i adjust codepage in autoanswer and autoreply messages? OTRS 2.4.5 with ITSM 1.3.1 Excuse my English Best Regards Denis Kirin