There could be many reasons to why it doesn't work but I will mark some of them for you c:
1. There is 1 thing missing. It could be the shelves of the rooms or the flowers.
2. When you have everything mirrored and it still doesn't let you further, you will get a message from the door saying "I should talk to cody" he will reveal it is the mirrors
3. It is a bug. I know this puzzle is 1 a lot of people have struggles with and so is on the list of fixing for later c: