ошибка с добавлением UITextFiled???

[ShockWave1024]

простая попытка добавить UITextField на канвас\
вызвала вот такую ошибку
кто нить знает куда бежать?

ИСХОДНЫЙ КОД

var text:UITextField = new UITextField();
      var format:UITextFormat = new UITextFormat( Application.application.systemManager, font, height );
      text.multiline = false;
      text.text = "TEXT";
      text.setTextFormat(format);
      text.antiAliasType = flash.text.AntiAliasType.ADVANCED;
      text.validateNow();
      addChild( text );

ОШИБКА

Main Thread (Suspended: TypeError: Error #2007: Parameter antiAliasType must be non-null.)
	flash.text::TextField/set antiAliasType [no source]
	mx.core::UITextField/validateNow
	mx.core::UITextField/set nestLevel
	mx.core::UIComponent/set nestLevel
	mx.core::UIComponent/http://www.adobe.com/2006/flex/mx/internal::addingChild
	mx.core::Container/http://www.adobe.com/2006/flex/mx/internal::addingChild
	mx.core::Container/addChildAt
	mx.core::Container/addChild
	ASComponents::classLayoutElementCell/ASComponents:classLayoutElementCell::vAddPrice
	ASComponents::classLayoutElementCell/ASComponents:classLayoutElementCell::vCreate
	flash.events::EventDispatcher/flash.events:EventDispatcher::dispatchEventFunction [no source]
	flash.events::EventDispatcher/dispatchEvent [no source]
	mx.core::UIComponent/dispatchEvent
	mx.core::UIComponent/set initialized
	mx.managers::LayoutManager/mx.managers:LayoutManager::doPhasedInstantiation
	Function/http://adobe.com/AS3/2006/builtin::apply [no source]
	mx.core::UIComponent/mx.core:UIComponent::callLaterDispatcher2
	mx.core::UIComponent/mx.core:UIComponent::callLaterDispatcher