Murder on the Orient Express

Cumbersom, non adventure, boring, slow, not fun puzzles, just collect things ove and over...Do not recommend.

Need help please, I agree that the puzzle is cumbersome and slow but I paid for it and insist on playing it, i apparently have missed some thing, have listened at every door and gone into room with the swedish lady so many times i hate her please advise how to progress.

You've probably missed a door. Are you listening with a glass in your hand?
If so, you need to count as you go. There are 16 numbers (not 16 doors as a few are pairs).