How To Spwan An Enemy Which Falls From Above Throughout The Game?

Hello,

I'm new to BB.. it's really great, but I'm having a hard time figuring how to solve this issue,

I'm making an Impossible game or Runner (can't see any difference actually)! anyway.. I wanted to make an Enemy (Trash Can) suspending on the air and whenThe Player gets near it falls.. and I did it

But.. the problem is spawning this Trash Can... when adding a Spawner Compenet.. it spawns the Trash Can.. but not like what I wanted instead... it spawns mlutiple trash cans when falling on the Player ??!!! ..
I want it to spwan randomlly throughout the game like the platforms.

I think the prolem has something to do with the Y linaer Velocity.. it seems the spawner works based on the velocity of the object!!!

Is there any solution !?

---
Pic : Trash Can settings
http://store2.up-00.com/2016-07/1469304138481.jpg




Pic: Result while playing
http://store2.up-00.com/2016-07/1469304138582.jpg