You will want to be systematic about this to save effort. First, watch 3D programming without glasses and determine as best you can whether the projected image on the screen is 3D. The clue will be a double image and a blurry image. If that is present consistently, then start watching with the glasses on. Turn on the glasses while looking through them and determine whether you ever see the 3D. You will know it if you see it.
By the way, usually we can bring up a menu on the projector to turn 3D on or off. If you turn the 3D off, you should see two images of your program side by side, or top to bottom. Then, when you turn 3D on with the projector remote, you should see the blurry double image without glasses and 3D with the glasses. Why not start there, let us know what you see, and we can go from there.