AUDREY73, it may not be your BluRay player, if fact I doubt that it is since most modern BluRay readers/burners are capable of handling 3D. have you set up 3D in the Nvidia control panel?
To set up your Nvidia card for 3D playback, open the Nvidia control panel (have 3D glasses handy) and run setup wizard for "Set up Stereoscopic 3D"...this will get the 3D portion working, but will drop the resolution to 720p. You can manually increase the resolution to 1080p (1920 X 1080p) and it will look great, but, at least on my computer, it will create an audio lag, meaning the the lips are out of sync and that synch tends to get worse the longer that that movie plays.
To repair the audio delay at higher resolutions, convert your movie in an MKV and play that back through PowerDVD. Super simple. MakeMKV beta is a great all in one tool for that purpose, or use whatever works for you.
Hope that helps.