You have a conflict with the Morgan Switch. It's a filter that enable the selection of audio stream in Windows Media Player. BSPlayer doesn't need it, and used to conflict with old versions.
2 solutions:
- Remove or just unregister the Morgan Switch 'MMSwitch.ax' that should be located in your %windir%\system directory, using:
REGSVR32.EXE /u "MMSwitch.ax"
- Upgrade MMSwith to
latest version.
For testing purpose I've just reactivated mine which is in V0.96B. It works just fine in windows mplayer2, and don't conflict when running BSPlayer.