i made a sequence where the player must reactivate an abandoned elevator to the surface and end up in a upper level of aperture, but for some reason the elevator keeps getting stuck on the player, which is weird because i used the same elements from the instances, only refurbished for style.

I don't see why this isn't working.

EDIT: the fuse breaker is behind a titled video panel on your right

Dat was hard to figured out, your prop_dynamic (name tube_open) is not working right,
COLLISIONS have to be set to NOT SOLID[/color], otherwise it causes player to stop and stop tracktrain under player because of interpenetrating.

Yeah when i builded my Elevator i had the same Problem, I dont know why the tube_opener has this weird Collision box, Just turn it to Not Solid.

this explains the brush surrounding it in the instance +_+