Rable
I don't have all the plugins needed to open your capx.
Did you add the four imagepoints to the corners of the walls? The first needs to be top-left, then clockwise top-right ... and so on. If you have that and it's still not working then maybe there is a typo.
If you think you may have made a typo you could just copy my events over as is. Take my capx and rename player to charWoldmap, and walls to collision. Then select all the events and copy it (ctrl+c). Next go to your capx and you can paste it (ctrl+z).