How to Suppress the JavaScript Error Message Box in VB.net?

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VB

Hello Everyone!

i get a trouble when i try to get data from a web page by WebBrowser control. i can get the web page by IE without error, but it occurs a error box when i use WebBrowser1.Navigate.
i have to navigate many pages to get the data page by page, how can i suppress the error box in .net 3.5?
(1) i tried "broswer.ScriptErrorsSuppressed = True",it not works.
(2) i tried such code ,it not works too.

Imports SHDocVw
Public Class EWebBrowser
    Inherits System.Windows.Forms.WebBrowser
    Private Iwb2 As SHDocVw.IWebBrowser2

    Protected Overloads Overrides Sub AttachInterfaces(ByVal nativeActiveXObject As Object)
        Iwb2 = DirectCast(nativeActiveXObject, SHDocVw.IWebBrowser2)
        Iwb2.Silent = True
        MyBase.AttachInterfaces(nativeActiveXObject)
    End Sub

    Protected Overloads Overrides Sub DetachInterfaces()
        Iwb2 = Nothing
        MyBase.DetachInterfaces()
    End Sub
End Class

Help me please, any answer is appreciated!