The newest drivers from ATI solved my problem. Thank you for your commitment and time.
Best regards!
Unfortunately in m2ts files DTSMA is not working where DTS Core is played. (Checked in many m2ts files, muxed out from Blu-ray discs). DolbyTHD works fine.It should work fine in m2ts files ine xample but there are some problems with dtsma in mkv files. We are investigating this.