Why won't the water button work?

[Quanain]

I tried turning on the water setting for a room that I want to be water-filled but when I play the level Lara just falls to the floor when I jump in.

Here you can see the water room below the ledge that Lara is standing on. The blue streaked wall in front of Lara is where I plan to put another room. What you see is the horizon.
http://i288.photobucket.com/albums/ll166/trfreak123/ArcticCircleScreen.jpg

This shows what happens when Lara is in the "water."
http://i288.photobucket.com/albums/ll166/trfreak123/ArcticCircleScreen2.jpg

This is how I've set up the room on NGLE. Am I doing anything wrong?
http://i288.photobucket.com/albums/ll166/trfreak123/LEScreen.jpg

[Spong]

Hasn't that "4" next to the Water button got to be a "2" for Lara to actually swim when she's in that particular room?

[Quanain]

I tried setting it to 2 and it still doesn't work.

[jeffrey van oort]

I tried setting it to 2 and it still doesn't work.

press the 0