TextArea Component has big problem on Windows Platform

Steps:
1. Create a QtQuick Application for symbian component using the wizard
2. Activate the MainPage.qml and drag a TextArea component to the canvas

Expected result:
TextArea can be edited in QML Designer and the related propeties are right

Actual result:
TextArea can't be seen in QML Designer and the properties are different from Linux Platform

Comment:
SDKTestRound17

*****************************************************************************************
import QtQuick 1.0
import com.nokia.symbian 1.0

Page {
id: mainPage

Text

{ id: text anchors.centerIn: parent text: qsTr("Hello world!") color: platformStyle.colorNormalLight font.pixelSize: 20 }

TextArea

{ id: textarea width: 180 height: 180 text: "TextArea" errorHighlight: false visible: true anchors.left:text.left anchors.top: text.bottom anchors.topMargin: 20 }

}
*****************************************************************************************