Multiple camera depth rendering

Hi,
I’ve got a problem maybe due because I’m tired and I do a really novice mistake but I have 2 cameras in my scene and the second one is never render on the screen.

I check each camera and the first one who render the game has a depth value of -1 and the second one has a depth value of 1.

Why my second one is never display ? Any idea ?

Have you set the Clear Flags parameter to depth only on the second camera (with depth value of 1)?

http://docs.unity3d.com/Manual/class-Camera.html