Adding IOErrorEventListener to TextArea

programming flash
1 
this._textArea.textField.loaderInfo.addEventListener(IOErrorEvent.IO_ERROR,_IOErrorHandler);
this._textArea.loaderInfo.addEventListener(IOErrorEvent.IO_ERROR,_IOErrorHandler);

gives: TypeError: Error #1009: Cannot access a property or method of a null object reference.


this._textArea.addEventListener(IOErrorEvent.IO_ERROR,_IOErrorHandler);

Doesn’t catch that error…
I must have missed something!