2 keys at once

programming flash
1

My code doesnt detect 2 kest at once.
I want to press an arrow key and spce bar.
In .net the below code does do this but in flash if I hold down an arrow key and press space bar the arrow key event will stop working.

private function doSomething(e:KeyboardEvent):void {

var mybackList:Array ;
mybackList=mybackground.getbackground ;

if (e.keyCode==39) {    myplayer.moveright(mybackList);     }// Right
     
if (e.keyCode==32 && myplayer.jumping ==false) {
myplayer.jumpStart();
}