Connection property has not been initialized

Imports System.Data.sqlclient
Public Class track
Inherits System.Web.UI.Page

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
'Put user code to initialize the page here
End Sub

Private Sub btntrack_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles btntrack.Click
Dim con As New
sqlConnection(ConfigurationSettings.AppSettings("connectionstring"))
Dim tracknumber As Integer
con.Open()
Dim cmd As New sqlCommand
cmd.Connection = con
Response.Redirect("database.aspx")
con.Close()
End Sub
End Class

Actually what i want in this means in first form there is one search
button.When i click that button it goes to the database page and shows
the details of that particular number.In this i put only datagrid.Can u
help me how to collect the data from database?plz.....................



Imports System.Data.sqlclient

Public Class database
Inherits System.Web.UI.Page

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
'Put user code to initialize the page here
Dim con As New
OleDbConnection(ConfigurationSettings.AppSettings("connectionstring"))
Dim TrackNumber As Integer
TrackNumber = CStr(Request.QueryString("TrackNumber"))
Convert.ToString("TrackNumber")
Dim cmd As New OleDbCommand("select * from track where
TrackNumber='" & Request.QueryString("TrackNumber") & " ' ", con)
con.Open()
DataGrid1.DataSource = cmd.ExecuteReader()
DataGrid1.DataBind()
con.Close()
End Sub

End Class