Verification Failure (Fingerprint DigitalPersona)

ive seen all the post related to my problem.. but i have different code .. i've searching for the answer for almost 2weeks now .. but no luck .. this is my code i dont know what's happening .. it keeps prompting Verification Failure .. i dont know whats the problem in my code .. the bolded line's where i guess the problem occurs .. can someone kindly help me to fix this :( im using vb.net 2010 as my front and MySql as my back-end.. im using DigitalPersona 4000B

    Sub OnComplete(ByVal Control As Object, ByVal FeatureSet As DPFP.FeatureSet, ByRef EventHandlerStatus As DPFP.Gui.EventHandlerStatus) Handles VerificationControl.OnComplete

        Dim con As New MySqlConnection("Server = localhost; Username= root; Password =; Database = fesdata")
        Dim cmd As New MySqlCommand("SELECT * FROM empdata", con)
        con.Open()
        Dim fpreader As MySqlDataReader = cmd.ExecuteReader


        Dim byteTemplate As Byte()
        Dim memStreamTemplate As MemoryStream

        Dim ver As New DPFP.Verification.Verification()
        Dim res As New DPFP.Verification.Verification.Result()

        If fpreader.HasRows Then
            While fpreader.Read

                byteTemplate = fpreader.Item("Fingerprint")
                memStreamTemplate = New MemoryStream(byteTemplate)
                Dim templa8 As DPFP.Template = New DPFP.Template()
                templa8.DeSerialize(memStreamTemplate)

                If Not FeatureSet Is Nothing Then

                    ver.Verify(FeatureSet, templa8, res)
                    If res.Verified Then
                        Call SEARCH_EMPLOYEE()
                    End If
                End If
            End While
        Else
            MsgBox("Unknown Employee!")
        End If
        fpreader.Close()


    End Sub