Problem with 4 addresses

am creating a character that moves in 4 directions all right until I realize that it moves on the objects that I want them to be like walls, my doubt is that I put it as if it were an obstacle like on one of platforms but it keeps walking like If it were a simple object, can you tell me how to make it not pass over the object?

Just use “Separate two objects” event when character is colliding with wall, in picture below Collidables is my wall object