Bookmark in Code not working.

I have a report in reporting services that has a bookmark value asigned to each row. In the following Page_Load event for the page, I'm getting the following error on the ReportViewer1.JumpToBookmark("6") statement:

"An exception of type 'System.InvalidOperationException' occurred in Microsoft.ReportViewer.WebForms.dll but was not handled in user code

Additional information: Some parameters or credentials have not been specified"

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

If Not IsPostBack Then

Dim strReport1 As String = "/ReportDirectory/CurrentWeekSales"

ReportViewer1.ServerReport.ReportServerUrl = New System.Uri(CStr(Session.Item("ReportServer")))
ReportViewer1.ServerReport.ReportPath = strReport1
ReportViewer1.ServerReport.Timeout = 500000

Do While ReportViewer1.ServerReport.IsDrillthroughReport
ReportViewer1.PerformBack()
Loop

Dim RptParameters1 As ReportParameter() = New ReportParameter(0) {}
RptParameters1(0) = New ReportParameter("EBO_EmpKey", CStr(Session.Item("UserKey")))
ReportViewer1.ServerReport.SetParameters(RptParameters1)

ReportViewer1.ServerReport.Refresh()

ReportViewer1.JumpToBookmark("6")

End If
End Sub

What am I missing?

ThanksI too am having a similar problem. I find that JumpToBookmark() simply does not work no matter what I try. Interestingly, setting the 'action' property of a TextBox within the report to jump to the target bookmark seems to work. Unfortunately, I need to be able to do this in code without having to force the user to click on the report.

Is this a known problem, or is there something else on the viewer and/or report that needs to be set?

Thanks,

Ian.