Updating the zoom view in a Crystal Reports in asp.net

I have a report in a asp.net page, the zoom is set initially in 100, but if it is changed, nothing happen and remain the initial set (100)
I tryied this:
  Protected Sub crViewer1_ViewZoom(ByVal source As Object, ByVal e As CrystalDecisions.Web.ZoomEventArgs) Handles crViewer1.ViewZoom
 End Sub
But an application error happened:

Is there another way for updating the zoom?

Who is Participating?
aslyasAuthor Commented:
I got an error if I did it from command button, but I solved it updating the zoom from the bindReport function:

Protected Sub BindReport(ByVal reporte As String)
        If oRpt Is Nothing Then oRpt = New ReportDocument
        Dim zoom As Integer = CInt(txtZoom.Text)
        Try            oRpt.Load(Server.MapPath(reporte))
            Me.crViewer1.ReportSource = oRpt              
        Catch ex As Exception
        End Try
    End Sub

I will give you the points since you point me in the direction.

Thanks a lot!
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