How can I match a fingerprint fmd from mysql database

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VB

Hello, Sorry for my Bad English. Im a student in indonesian SMK which i want to make management system for my school, I used U Are U From Digital Persona for Student Attendance System and i beginner on VB.Net interfacing with Digital Persona U Are U 4500 The problem is, i dont know what the error and i dont know how to Deserialize and Serialize An FMD to MySQL Database. My database datatype is LONGBLOB. I Used this code for serialize

cmd = New MySqlCommand("insert into finger_data(finger) values(@jari)", conn)
With cmd
   .Parameters.AddWithValue("@jari", Fmd.SerializeXml(resultConversion.Data))
   .ExecuteNonQuery()
End With

When i stored the serialize fmd to database is work. And i dont know how to Deserialize.

What I have tried:

I Tried this code for Deserialize fmd from database. And i get this error message "An unhandled exception of type 'System.IndexOutOfRangeException' occurred in System.Data.dll

Additional information: There is no row at position 1.

This My Code For Deserialize. I have tried for a long days for this... So Anyone can help me please... Thanks before...

Public Sub OnCaptured(ByVal captureResult As CaptureResult)

        If Not _sender.CheckCaptureResult(captureResult) Then
            Return
        End If

        SendMessage(Action.SendMessage, "The Fingerprint Was Captured")

        Dim resultConversion As DataResult(Of Fmd) = FeatureExtraction.CreateFmdFromFid(captureResult.Data, Constants.Formats.Fmd.ANSI)
        If captureResult.ResultCode <> Constants.ResultCode.DP_SUCCESS Then
            _sender.Reset = True
            Throw New Exception(captureResult.ResultCode.ToString())
        End If

        If count = 0 Then

            firstFinger = resultConversion.Data
            count += 1
            SendMessage(Action.SendMessage, "Now place the same or a different finger on the reader.")

        ElseIf count = 1 Then

            secondFinger = resultConversion.Data
            count += 1
            SendMessage(Action.SendMessage, "Now place the same or a different finger on the reader.")

        ElseIf count = 2 Then

            AnyFinger = resultConversion.Data
            Dim fmds As Fmd() = New Fmd(1) {}
            fmds(0) = firstFinger
            fmds(1) = secondFinger

            Dim thresholdScore As Integer = PROBABILITY_ONE * 1 / 10000

            Dim ds As New DataSet
            adt = New MySqlDataAdapter("select * from finger_data where finger", conn)
            adt.Fill(ds, "finger_data")

            Dim A As Integer = ds.Tables("finger_data").Rows(1).Item(0) //I got Error on this Line
            Dim Y As Byte() = DirectCast(ds.Tables("finger_data").Rows(0).Item(2), Byte())
            Dim value As String = System.Text.Encoding.Unicode.GetString(Y)
            Dim X = Fmd.DeserializeXml(value)

            Dim identifyResult As IdentifyResult = Comparison.Identify(X, 0, fmds, thresholdScore, 2)
            If identifyResult.ResultCode <> Constants.ResultCode.DP_SUCCESS Then
                _sender.Reset = True
                Throw New Exception(identifyResult.ResultCode.ToString())
            End If

            SendMessage(Action.SendMessage, "Result Of The Identification " + identifyResult.Indexes.Length.ToString())
            SendMessage(Action.SendMessage, "Place Index")
            count = 0
        End If
    End Sub