I don't know what's causing your problem.
Just another possibility to try (note you will have to check your specific settings after doing this) is as follows:
- Without BSPlayer being active goto BSPlayer's installation folder and rename the file BSPlayer.xml e.g. to xBSPlayer.xml (by renaming in stead of removing you can restore settings if necessary).
- Start BSPlayer by double clicking on its shortcut
- right-click on skin > Options > Preferences > Plugins
- deselect "Disable plugins (restart required)"
- Click [Close] and exit BSPlayer
- Restart BSPlayer > Options > Skins and then select skin you want
- Click [Close] and exit BSPlayer
Any luck if you start BSPlayer again now?