Long Jump

programming
1

I need some help with a Long Jump game ( if that is how its spelled ) .
But my script doesnt work


// x =88   -   Z = 90 //

onClipEvent(enterFrame){
xSpeed -= 4 ; 
	_x += xSpeed;
if(Key.isDown(90)){
this.gotoAndPlay("run");
trace ("Z")
if(left == false){
			xSpeed += 10;
		}
	left == true;
	right == false;
}
 
if(Key.isDown(88)){
	trace ("X")
	if(left == false){
	xSpeed += 10;
}
	right == true;
	left == false;
}
}

I tought this would work , but it doesnt …
there is no errors in the script but my object doesnt start to run
i want it to run but you have to tap the ‘Z - X’ buttons quickly after echoter(?)
Does anyone know the problem ?

-Joppe