Can you clarify what you mean by you can't close it? Do you mean it wont lock or when you press it down, it wont latch and freely opens again?

The reason I ask is if you had your smartkey in a bag or something and put it in the truck, it will not lock. This means that if you try to open the trunk it will open. It with latch close though, but it won't lock. Also, I believe it will sound a 2 second or so beep if you close the trunk with the key in it.