I have problems when I play wmv files in Windows 7. I can't get dolby or DTS through SPDIF on my sony reciever. MKV however works fine. . On the same computer I had a Vista installed and had no problems playing WMV files with AC3 and DTS. I used ffdshow and ac3filter in line with media player classic. Now in Windows 7 I installed the same applications and wmv does not come with AC3 or DTS. I spent days now testing, installing different codecs . Are there more people experiencing this problem? I use the x64 windows 7 ultimate. Thanks for the help.