Thank you for your first reply, jnabq!
Hope you will read this again and have better idea about my problem.
Here is full detail of my system.
Display: benq w710st. (DLP, 3d ready - connected to the laptop via HDMI cable)
Computer: laptop (intel core i5)
Video card: nvidia GeForce GTX 660M (2 GB).
blu ray drive: external LG drive, CP40. (connected to the laptop via USB 2.0)
3D glasses: okba 3d active shutter glasses.
As I said before, it does play back 3D movie perfectly with Bino player if it exists as file - so I believe I don't have any HW problems. Unfortunately bino seems not support blu ray play back.
Problem: I cannot play back blu ray media, no matter what player I use.
It seems that the commercial players (e.g., powerDVD, total media theater...) can certainly read the media in 3D format; I know this since it reads the BD and shows red-cyan type anaglyph 3D picture. But that's not the right way to display out - my projector can display 120hz frame sequential format. The program seems not recognize my projector as shown the error message in my first thead.
Question: why my system cannot play back 3D blu ray media while it can do with 3D computer file?
Thank you for reading my somewhat long thread.