as3 Object araba is not moving - actionscript-3

Question

Here is my code at below and im keep getting this error i've became a freak for 3 days please help me guys.I will be appriciate your comments.
import flash.display.MovieClip;
import flash.events.Event;
import flash.events.KeyboardEvent;
import flash.ui.Keyboard;
import flash.display.Bitmap;
stage.addEventListener(KeyboardEvent.KEY_DOWN, basili);
stage.addEventListener(KeyboardEvent.KEY_UP, degil);
stage.addEventListener(Event.ENTER_FRAME, giris);
var yukari:Boolean = false;
var asagi:Boolean = false;
var sola:Boolean = false;
var saga:Boolean = false;
var hiz:Number = 5;
var araba:MovieClip=new araba();
var masa:MovieClip =new masa();
function giris(event:Event):void
{
if ( sola && !saga ) {
araba.x -= hiz;
araba.rotation = 270;
}
if( saga && !sola ) {
araba.x +=hiz;
araba.rotation = 90;
}
if( yukari && !asagi ) {
araba.y -= hiz;
araba.rotation = 0;
}
if( asagi && !yukari ) {
araba.y += hiz;
araba.rotation = 180;
}
if( sola && yukari && !saga && !asagi ) {
araba.rotation = 315;
}
if( saga && yukari && !sola && !asagi ) {
araba.rotation = 45;
}
if( sola && asagi && !saga && !yukari ) {
araba.rotation = 225;
}
if( saga && asagi && !sola && !yukari) {
araba.rotation = 135;
}
if( araba.y < masa.y ){
araba.y = masa.height;
}
if( araba.y > masa.height ){
araba.y = masa.y;
}
if( araba.x < masa.x ){
araba.x = masa.width;
}
if( araba.x > masa.width ){
araba.x = masa.x;
}
}
function basili (event:KeyboardEvent):void
{
switch( event.keyCode )
{
case Keyboard.UP:
yukari = true;
break;
case Keyboard.DOWN:
asagi = true;
break;
case Keyboard.LEFT:
sola = true;
break;
case Keyboard.RIGHT:
saga = true;
break;
}
}
function degil(event:KeyboardEvent):void
{
switch( event.keyCode )
{
case Keyboard.UP:
yukari = false;
break;
case Keyboard.DOWN:
asagi = false;
break;
case Keyboard.LEFT:
sola = false;
break;
case Keyboard.RIGHT:
saga = false;
break;
}
}
<code>

Answer 1

From
var araba:MovieClip=new araba();
var masa:MovieClip =new masa();
To
var araba:MovieClip=new MovieClip();
var masa:MovieClip =new MovieClip();
If araba and masa are actually your custom classes, then you forgot to import those 2 classes.
Use Flash Builder or Flash Develop for your development for auto imports and smart error checking.