Flex - PDF : 아크로벳 리더 프로그램이 있어야지만 실행됨

if(HTMLLoader.pdfCapability == HTMLPDFCapability.STATUS_OK) {        var swfFilePathName:String = "file:///" + e.where;        trace("PDF Path : " + swfFilePathName);        var request:URLRequest = new URLRequest(swfFilePathName);        var pdf:HTMLLoader = new HTMLLoader();        pdf.width = pv.width - 20;        pdf.height = pv.height - 50;        pdf.load(request);               var pdfView:UIComponent = new UIComponent();        pdfView.addChild(pdf);        if(pv.removeChildAt(0)) {         pv.removeChildAt(0);        }        pv.addChild(pdfView);       } else {        Alert.show("Adobe Reader 프로그램이 설치가 되어있지 않습니다.","알림");       }