problem

for each (var newMislen:Mislen in mislenArray )
                {
                            yDistance = hero.y - newMislen.y;
                            xDistance = hero.x - newMislen.x;


                            if (Math.sqrt(yDistance*yDistance +  xDistance*xDistance) < speed)
                            {
                                    newMislen.x = hero.x;
                                    newMislen.y = hero.y;
                            } else
                            {
                                var radian:Number = Math.atan2(yDistance, xDistance);
                                newMislen.x += Math.cos(radian) * speed;
                                newMislen.y += Math.sin(radian) * speed;
                            }

                        }

                for each (var bullet:Basicbullet in bullet1Array)
                    {
                        if(bullet.hitTestObject(bSideLine) || bullet.hitTestObject(bSideLine1) || bullet.hitTestObject(bUpLine) || bullet.hitTestObject(bUpLine1) )
                            {
                                bullet.x=200000;
                                stage.removeChild(bullet);
                                bullet1Array.splice(bullet,0);
                                break;
                            }

                        for each (var newMi1slen:Mislen in mislenArray )
                        {
                            if(bullet.hitTestObject(newMi1slen) && stage.contains(newMi1slen))
                            {
                                newMi1slen.x=100000;
                                stage.removeChild(newMi1slen);
                                mislenArray.splice(newMi1slen,0);
                                bullet.x=200000;
                                stage.removeChild(bullet);
                                bullet1Array.splice(bullet,0);
                            }
                        }
                    }