Object does not disappear?

phantomizador

I have a wall placed which can be interacted with through dialogue in order to break through it, the way i have it setup is i made a dialogue for it that the player can interact with, i have Appear When set to "Immediately" and Disappear When set to "Dialogue Prompt Reached" and the line on which i want the wall to disappear selected. When i test it out, everything works fine, except that the actual wall does not disappear, but once the required dialogue is accessed you can just walk through the wall as if it weren't there.

What gives?