BSPlayer doesn't start when called from ShellExecute

[casueps]

I have a custom program that displays thumbnails of some videos and when the user clicks on one of them it uses the Win32 API function ShellExecute to open that video file with the associated program. So it should be the same as double clicking on that video file in windows explorer, but with the last version of BSPlayer it doesn't open up. If I associate video files with another program it works, and also if i install an older version of BSPlayer and associate video files with it, but not with this one.

Obviously I am not asking you to modify BSplayer to suit my program, but I believe that there must be many other programs that open video files that have stopped working with this version.