Mi a hiba, miért nem engedi a txtarea elemet sem string sem pedig number változóval?

stop();

txta_visszapofazo.editable=false;

txta_jatt.editable=false;

txta_penz.editable=false;

txta_xp.editable=false;

txta_fizetendo.editable=false;

txta_liter.editable=false;

txta_egysegar.editable=false;

btn_95.enabled=false;

btn_98.enabled=false;

btn_100.enabled=false;

btn_d.enabled=false;

btn_de.enabled=false;

btn_du.enabled=false;

mc_car_1.diesel=true;

mc_car_1.benzin=false;

mc_car_2.diesel=true;

mc_car_3.benzin=false;

mc_car_3.diesel=false;

mc_car_3.benzin=true;

var jatt:String="0";

var xp:String="0";

var penz:String="0";

var megvantankolva:Boolean=false;

var bealltmar:Boolean=false;

var diesel=false;

var benzin=false;

var fizetendo:String="0";

var liter:String="0";

var egysegar:String="0";

txta_jatt.text=jatt;

txta_xp.text=xp;

txta_penz.text=penz;

txta_fizetendo.text=fizetendo;

txta_liter.text=liter;

txta_egysegar.text=egysegar;

btn_95.addEventListener(MouseEvent.CLICK, fuel95);

function fuel95(e:MouseEvent):void

{

txta_egysegar.text="195";

}

btn_98.addEventListener(MouseEvent.CLICK, fuel98);

function fuel98(e:MouseEvent):void

{

txta_egysegar.text="225";

}

btn_100.addEventListener(MouseEvent.CLICK, fuel100);

function fuel100(e:MouseEvent):void

{

txta_egysegar.text="275";

}

btn_d.addEventListener(MouseEvent.CLICK, fueld);

function fueld(e:MouseEvent):void

{

txta_egysegar.text="235";

}

btn_de.addEventListener(MouseEvent.CLICK, fuelde);

function fuelde(e:MouseEvent):void

{

txta_egysegar.text="250";

}

btn_du.addEventListener(MouseEvent.CLICK, fueldu);

function fueldu(e:MouseEvent):void

{

txta_egysegar.text="285";

}

btn_ajto.addEventListener(MouseEvent.CLICK, goshop);

function goshop(e:MouseEvent):void

{

gotoAndPlay(4)

}

var sorsolas:Number = Math.round(Math.random()*2);

if (sorsolas==0) {

mc_car_3.gotoAndPlay(2);

}

if (sorsolas==1) {

mc_car_2.gotoAndPlay(2);

}

if (sorsolas==2) {

mc_car_1.gotoAndPlay(2);

}

if (bealltmar==true&&diesel==true){

btn_95.enabled=true;

btn_98.enabled=true;

btn_100.enabled=true;

btn_d.enabled=true;

btn_de.enabled=true;

btn_du.enabled=true;

}

if (bealltmar==true&&benzin==true){

btn_95.enabled=true;

btn_98.enabled=true;

btn_100.enabled=true;

btn_d.enabled=true;

btn_de.enabled=true;

btn_du.enabled=true;

}