Hi, i have formview control in my page and on that i have two textboxes and button in it which display at runtime. i declare the button event in my aspx.vb

Protected Sub insertbutton_Click(ByVal sender As Object, ByVal e As System.EventArgs)
        If Not Page.IsValid Then Exit Sub

        ' Determine the currently logged on user's UserId
        Dim currentUser As MembershipUser = Membership.GetUser()
        Dim currentUserId As Guid = CType(currentUser.ProviderUserKey, Guid)

        Dim connectionString As String = ConfigurationManager.ConnectionStrings("SecurityTutorialsConnectionString").ConnectionString
        Dim insertSql As String = "INSERT INTO Reply(Subjects, Bodi, CommentDates UserId) VALUES(@Gameid, @Subjects, @Bodi, @CommentDates, @UserId)"

        Using myConnection As New SqlConnection(connectionString)

            Dim myCommand As New SqlCommand(insertSql, myConnection)
            myCommand.Parameters.AddWithValue("@Subject", subject1.Text.Trim())
            myCommand.Parameters.AddWithValue("@message", message.Text.Trim())
            myCommand.Parameters.AddWithValue("@CommentDates", DateTime.Now())
            myCommand.Parameters.AddWithValue("@UserId", currentUserId)
            Label2.Text = "Your Comment has Been Added to our Database. Thank You"
        End Using

    End Sub

and the button property

<asp:Button ID="Button1" runat="server" Text="post" CausesValidation="true" OnClick="insertbutton_Click" />

but when i click on button it shows the error like this.

Compilation Error
Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: BC30451: Name 'subject1' is not declared.

Source Error:

Line 39: 
Line 40:             Dim myCommand As New SqlCommand(insertSql, myConnection)
Line 41:             myCommand.Parameters.AddWithValue("@Subject", subject1.Text.Trim())
Line 42:             myCommand.Parameters.AddWithValue("@message", message.Text.Trim())
Line 43:             myCommand.Parameters.AddWithValue("@CommentDates", DateTime.Now())

i place the following in my onload event

Dim drp As Label
        drp = form1.FindControl("Label2")

        Dim erp As TextBox
        erp = form1.FindControl("subject1")

        Dim crp As TextBox
        crp = form1.FindControl("message")

but the object not handled at runtime.

Please help me to solve this.

Thank you