Forgotten Caves - can't get the last secret...

[Unecessary Umlauts]

Ok, in the Forgotten Caves I have 4 out of 5 secrets. The one I am missing is all the way to the right of the level, right before you hit the water. There's a few barrels, then you slope down and there is a door there with a switch behind it. I have tried everything I can think of and can't get that damn door open. Help!

[SentinelGest]

You need to go to the library and use the red transporter. You will then be able to go get the secret.

[Unecessary Umlauts]

Thank you!