Abnormal Login Page Behavior

Hello i m new to ASP.net, i have created a form and have these controls on it

1. Login Name Textbox
2. Password Textbox
3. A button (Form Submit Button not the HTML Submit button)
4. A label named lblNote to show a simple msg that login is successful or not.

I have a Database named LoginSite.mdb which is a part of my project. This database has only loginName and Password in it.

Now i wrote this code in my button click event.

Code:

---

Imports System.Data.OleDb
Partial Class MainForm
    Inherits System.Web.UI.Page

    Dim dbConn As OleDbConnection
    Dim dbcmd As New OleDbCommand
    Dim rs As OleDbDataReader
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        dbConn = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;data source=" & Server.MapPath("LoginSite.mdb"))
        dbconn.Open()
        dbcmd.Connection = dbConn
     
    End Sub

    Protected Sub btnLogin_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnLogin.Click
        Try
            dbcmd.CommandText = "Select * from LoginTBL"
            rs = dbcmd.ExecuteReader()

            While (IsDBNull(rs))
                If (rs("loginName").Equals(txtLoginName.Text) = True And rs("loginPassword").Equals(txtPassword.Text) = True) Then
                    lblNote.Visible = True
                    lblNote.Text = "You have been Successfully Logged in"
                Else
                    lblNote.Visible = True
                    lblNote.Text = "Error Logging In !!!"
                End If
            End While

        Catch ex As Exception
            lblNote.Text = "Error Logging In !!!"
        End Try
    End Sub
End Class

---

The problem is that i m not able to see the lblNote label with any kind of information about the login being successful or not. lblNote is not being displayed.

Please Help !!!

Got It :)

The Error was in this Line
while (isDbNull(rs))
it should be like this
While (rs.read)