HELP Game Scene 8 (-1) Cannot be loaded because it has not been added to the build settings

Ok so I added eight scenes into Unity's build settings and I have a script

function OnCollisionEnter(col : Collision) {

Application.LoadLevel ("UnityOutsetIslandBlockETGameScene8");

}

So that when I step on a block I load a new scene. But when I step on the block to load the new scene I get an error that says

"Level UnityOutsetIslandBlockETGamescene8 (-1) cannot be loaded because it hasnt been added to the build settings."

This Script works with all the other blocks I put the script on and changed the name to the levels.

I already added it to the build settings and I tried moving it around so it can be negative one but it wont go behind zero What should I do??????