OnCollisionEnter only detects once

Questions & Answers
1

This code works as it detects collision between a cube a floor and a Wall.
The problem is the cube I drop (like this video), is that I only detect the collsiion once with the wall and floor, even though the cube bounces around many times on the floor. Why is this?

http://www.unity3dstudent.com/2010/07/beginner-b01-basic-collision-detection/

void OnCollisionEnter(Collision collision) {

	if (collision.gameObject.name=="Floor")
	{
		Debug.Log("Hit Floor");
	}
	if (collision.gameObject.name=="Wall")
	{
		Debug.Log("Hit wall");
	}
	
}
2

For the collision to be detected again, the cube must leave the floor completely. If it just slide, then it doesn’t enter again. Make sure the cube bounces high enough.

3

aaarrggghh I had collapse selected and not clear on play. my mistake again.