How can I open the trap door.and why I can't pick up the goblet?

The trap door is set on a spring to the box where the goblet is. Which you have to go to the tree stump where you sprayed the mosquitoes with the bug spray in the closet drwaer. You have to find the code to the cabnet underneatth the trap door. The code is in the fountain right beside the bench. You have to clear the water up. Now back to the tree stump you see that sparkling object?. If yes the you havent found the chlorine bottle yet in the hidden object scene. Find it and you will able to pour it in the water and clear it up and you will get you code for the lock on the cupbard. All the goblest are not easy to find. One of them is on the fireplace mantle were mrs.Lawson is standing. Another one is right beside the study door and the master bedromm. The statues of the man ios where you pick up another goblet. There is one of the in the graveyard in the tomb of Phineas Crown on the table wher you got the lantern is where you get you next goblet or urn. Later on you will hav to go up stairs into the attice and do the hidden object scene for the glass which we will use in a further time.

I found the code in the fountain, but the game does not recognize it. It wont write it into the journal, and therefore it wont allow me to use it. What can I do?