how do i stop this...

... i create rooms using WED and whenever i play them the main character can always walk through the walls. is there any way i can stop this from happening?

code? add something to the room?

Use c_move, not my.x += ... ( -> Manual)

Answered already! thanks for that Superku. i must admit i dont know much about scripting, but now i know that little more. thanks for the answer.