Connection problem to Informix from SQL Server 2005 with Unicode data

I have Informix 9.4TC6 and SQL Server 2005. DB_LOCALE in Informix DB is en_US.utf8 (en_US.57372). First, I created DSN to Informix. Then tried to get data with WinSql tool and it works fine. But when I created linked server in SQL Server 2005 I have problems with languages other than English. I get a string like: 荒川化å|å·¥æ¥æ ªå1/4ä1/4šç¤3/4 It seems to me that SQL Server splits 2-byte characters in 2 1-byte characters. If in options of linked server we set Collation Name to exact language we want --> then string data will be correct (of course only of language that we choose). Do you have any suggestions????????? P.S. I don't want to use SSIS (DTS) for extraction from Informix DB