How can I make the box through the character moving?

Now I make game like Super Mario.
Do you know about the box in Mario?

I need that. So I tried the box. The difference is The box is passed by character when the character passes it. And then the box is faded.
So the collision detection is needed.

But the box collision works well. This make the character stuck.
I used the userProcess(). In the function, I designed the box is collisionPrimitives:: NULL when the crash happened.

But therer are still some stuck.

How can I solve that?
Thanks for reading