picture saving in mysql using vb.net in window7

[Sabir]

I want to save picture in mysql database using vb.net. it work in Window8 and xp but not working in window7. following is the code.
'^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^ ^^

Dim ms As MemoryStream = New MemoryStream
PictureBox1.Image.Save(ms, Imaging.ImageFormat.Jpeg)
Dim bytBLOBData(ms.Length - 1) As Byte
ms.Position = 0
ms.Read(bytBLOBData, 0, ms.Length)
Dim prm As New MySql.Data.MySqlClient.MySqlParameter("@BLOBData", MySql.Data.MySqlClient.MySqlDbType.LongBlob, _
bytBLOBData.Length, ParameterDirection.Input, False, _
0, 0, Nothing, DataRowVersion.Current, bytBLOBData)
Dim ekle As New MySql.Data.MySqlClient.MySqlCommand("update ogrenci set resim=@BLOBData where id='" & ogrid & "'", cnn)
ekle.CommandType = CommandType.Text

ekle.Parameters.Add(prm)
Dim gln As Byte
cnn.Open()
gln = ekle.ExecuteNonQuery()
MsgBox(gln.ToString)
cnn.Close()

'^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^ ^^
What is the problem with it???????????