The Wonderland Board

Dear Puzzle Solver,
I'm not actually lost, because I know where I am, but I can't get to where I want to be !!

I'm in the Rainbow Pool Area and after completing three levels there (Seven Locks, Stinkers in the Dark - thank you so much Erwin for all your help. I would never be where I am now without you and your solutions - and Teleportation) and I had three rainbow keys. One I took back to the beginning and collected the goodies behind the Hidden Rainbow Gate. The other two I used to open the rainbow gates in the Pool area, but now there is a wooden door that will not open. Beyond it I can see 5 more gold stars waiting to be played.

What am I missing?

Please write and put me out of my misery,
Frustrated in the Rainbow Pool.

you have to take the other door to get to these stars. simply get out of the place where you are and use the other door to get into. I don't remember if you have to take the blue transporter to get to that door but I know you use the other entrance. Hope I'm clear and that will help you.

Additional information:

Here's a screenshot.

The wooden door is closed for ever.
You only need to step on the pink button to open the pink gate.
Then return, and go to the blue diamond button outside.
Then use the blue transporter to ride you to the entrance to the cellar again. But now beyond the wooden door.