Problem with going through block

A very ancient beginner question.
Hey, I created a flat cube and imported into Unity. My character have a character controller on it and I tried equipping the cube with the box collider, sphere coliider, rigidbody, ect, but my character can still go through the cube. You experts have any idea why that is so? For the regular cube I created from Unity, my character cannot go through, it’s only the imported cube.

Thanks!

Did you remember to make sure the collider was scaled to the size of the cube?

That did the trick! Thanks, Murgilod, you’re the bomb.

Hah, yeah, I had that problem a billion times when I was importing my boss collision meshes on my current project.

Kool! Now thanks to you, I have learn how to deal with this problem if I ever come across it again. Thanks very much again.