Character won't bounce off walls

1

I can only get my character to bounce off of walls above him, and to the left of him! when going right or down, he just goes right through… I tried a lot of combinations. Little push in the right direction please?


private function loop(e:Event) : void {
		
			
			//if (goingLeft) this.animGus.gotoAndPlay(51);
			//if (goingRight) this.animGus.gotoAndPlay(52);
			//this.animGus.gotoAndPlay(52);
			//trace(i****);
			
			
			//Direction
			
			
			
			//Key commands
			
			if (key.isDown(Keyboard.LEFT)) {
				if (!goingLeft)  this.animGus.gotoAndPlay(26);
				goingLeft = true;
				goingRight = false;
				vx -= xSpeed;
				
			} else if (key.isDown(Keyboard.RIGHT)) {
				if (!goingRight) this.animGus.gotoAndPlay(1);
				goingRight = true;
				goingLeft = false;
				vx += xSpeed;

			} else {
				if (goingRight) this.animGus.gotoAndStop(52);
				if (goingLeft) this.animGus.gotoAndStop(51);
				goingLeft = false;
				goingRight = false;
				vx *= friction;
				
			}
			
			if (key.isDown(Keyboard.UP)) {
				
				vy -= ySpeed;
			
			} else if (key.isDown(Keyboard.DOWN)) {
			
				vy += ySpeed;
			
			} else {
			
				vy *= friction;
			
			}
			
			
			/*if(vx > 0 && i****) {
				vx *= -1;
			} else if (vx < 0 && i****) {
				vx *= 1;
			}
			
			if(vy >0 && i****) {
				vy *= 1;
			} else if (vy >0 && i****) {
				vy *= -1;
			}*/
			
			if(i****) {
				if (vx > 0) {
					vx *= 1;
				} else if (vx < 0) {
					vx *= -1;
				}
				if (vy > 0) {
					vy *= 1
				}else if(vy < 0) {
					vy *= -1;
				}
				
			}
			trace("vx = "+vx);
			trace("vy = "+vy);
			
			this.x += vx;
			this.y += vy;
			}