How detect HMD position when walking in VR

Hola!

I have a trigger box, when I cross it using teleport, it detects the player (me), but when I just walk in the physical space and cross it, it doesn’t detect me.

What should I do to be detected also when walking around in physical space?

Thanks in advance

Anyone can help me with this? How to trigger a trigger box once I am in that area, when walking on real space (not using teleportation)