OnCollisionEnter - Destroy object, Simple question

This is a simple question, and I've taken a long break from Unity, and I've forgotten alot!, Basically, There's 4 keys around the level, One of which is the "CorrectKey" which you will need to obtain to open a door and progress to the next level, Now. I'm trying to make is so when you walk into the key, It will delete it, and then set a boolean variable to True saying you have a key, The only issue I'm having is i can't seem to get Unity to recognise when I Collide with the key, I don't know if i'm not using the correct colliders or something, But here's a few screenshots.

Player properties: http://i.gyazo.com/e7bbf7bb25032e04b316de10ca212899.png

Key Properties: http://i.gyazo.com/9105113e028d874c3aa066ce7416857a.png

Script (Attached to player): http://i.gyazo.com/1ffe9dbca4e2badb9d0df495c339c52f.png


Any help is appreciated

 

There are 2 methods related to doing this
OnTriggerEnter http://docs.unity3d.com/ScriptReference/Collider.OnTriggerEnter.html
OnColliderEnter http://docs.unity3d.com/ScriptReference/Collider.OnCollisionEnter.html

The issues to getting this working surround whether each entity is a trigger and/or has a rigidbody.
For collisions, one of the entities must be have rigidbody or is a Trigger.

For your case, you could check the isTrigger on the key, and handle in OnTriggerEnter.

The bottom of this page has a useful table:
http://docs.unity3d.com/430/Documentation/Components/class-CapsuleCollider.html

For some reason, the new docs got rid of the table.

In addition, don't forget to check the layers each entity is on - this is controlled by setting the collision matrix.
(In your case, looks like both are in the Default layer)
http://docs.unity3d.com/Manual/LayerBasedCollision.html

 

Thanks alot!, Set the key as a trigger and used OnTriggerEnter instead, And it works, Appreciate the help!