Dynamics User Group

Below is the patch of code that is executed on the  click  event of the button.I am trying to Send the data table information from vb.net using microsoft business connector to axapta method as a parameter(Table Buffer).But following error occurs.

Unable to cast object of type 'System.Data.DataTable' to type 'Microsoft.Dynamics.BusinessConnectorNet.AxaptaBuffer'. 

is there any other solution to pass datatable infomation to axapta method as buffer ?? 

code i have used :- 

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        Dim axRouteReference As AxaptaObject
        Dim Buffer As AxaptaRecord
        Try

            AxaptaObj = AxaptaLogon(Gbl_Company)

                        buffer=AxaptaObj.CreateAxaptaBuffer()    

            axRouteReference = AxaptaObj.CreateAxaptaObject("PwC_VB_Route")

                        Buffer=vgrdRouteLines.DataSource 

            Call axRouteReference.Call("UpdateDataRouteJournalLines ", Buffer)

            MsgBox("Done") 

        Catch ex As XppException
            Call MsgBox(ex.Message)

        End Try

        AxaptaObj.Logoff()

        AxaptaObj = Nothing

    End Sub