QTP如何识别WinEdit？

    用QTP录制自带的飞机订票系统时，在订单号处为什么不能识别WinEdit("Order No:")，Order No:在对象仓库是存在的。麻烦高手帮解决，谢谢！
代码如下：
Window("Flight Reservation").WinEdit("Order No:").Check CheckPoint("Order No:")'Order No:对象的检查点

Dim Oder_No              '定义获取Oder No对象为是否为空的变量

Oder_No=Window("Flight Reservation").WinEdit("Order No:").GetROProperty("text")

If Oder_No<>"" Then

      Reporter.ReportEvent micPass,"订票成功","根据Oder No对象text属性不为空判断订票成功"

      Reporter.ReportEvent micPass,"订单号","订单号为："&cint(Oder_No)

else

   Reporter.ReportEvent micFail,"订票失败","根据Oder No对象text属性为空判断订票成功"

End If

检查点处报错如下：Cannot identify the object "Order No:" (of class WinEdit). Verify that this object's properties match an object currently displayed in your application.

判断取值时报错如下：The "Order No:" WinEdit object was not found in the Object Repository.
Check the Object Repository to confirm that the object exists or to find the correct name for the object.

郁闷！麻烦各位高手帮忙解决，谢谢