Verifying captured image from bio-metric device(fingkey hamster)

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VB

Hi Friends
I am developing software for payroll which includes fingerprint images
I have captured the image successfully but when I try to verify the image, verification fails if we have more then one record in DB but it works with one record.
Kindly help us with this.
Thanks and regards
Kannan.

What I have tried:

Private Sub btn_Verify_Click_1(sender As System.Object, e As System.EventArgs) Handles btn_Verify.Click


        SetInitValue(pbVerify.Handle.ToInt32())
        Dim m_FIR As NBioAPI.Type.HFIR
        Dim m1_textFIR As NBioAPI.Type.FIR_TEXTENCODE
        Dim ret As UInteger = m_BioAPI.Capture(m_FIR, NBioAPI.Type.TIMEOUT.[DEFAULT], m_WinOption)
        If ret = BioAPI.[Error].NONE Then

            m_BioAPI.GetTextFIRFromHandle(m_FIR, m1_textFIR, True)
            labelMessage.Text = "Capture Successfull !!"
            Try
                Dim cmd As New OleDbCommand("Select * from FingerPrintData")
                cmd.Connection = myconnection
                Dim reader As OleDbDataReader = cmd.ExecuteReader()
                Dim userID As String = ""
                Dim fpdata As String = ""
                Dim name As String = ""
                While reader.Read()
                    userID = reader.GetString(1).ToString()
                    fpdata = reader.GetString(3).ToString()
                    name = reader.GetString(2).ToString()

                End While
                Dim textFIR As New NBioAPI.Type.FIR_TEXTENCODE()
                textFIR.TextFIR = Fpdata
                Dim result As Boolean

                Dim payload As New NBioAPI.Type.FIR_PAYLOAD()
                m_BioAPI.VerifyMatch(textFIR, m1_textFIR, result, payload)
                If result Then

                    MessageBox.Show(name + txtuserverify.Text + " Verified successfully !!")
                Else
                    MessageBox.Show("Verification Failed !!! Try Again ")
                End If
                pbVerify.Image = Nothing

                cmd.Dispose()


            Catch ex As Exception
                labelMessage.Text = "Database Exceptiom occured.."
            End Try
        Else
            MessageBox.Show("Capture process Failed !!!")
        End If
    End Sub