Visual Basic Login page causing an error (Error BC30506 Handles clause requires a WithEvents....)

I'm quite a newbie in asp.net and/or VB, I'm trying to make a simple mysql authentication login page on my asp.net webform. I'm getting the same error every time I try to run my page and I have no idea how to solve it. Here is the error:

Error   BC30506 Handles clause requires a WithEvents variable defined in the containing type or one of its base types.  Test1   C:UsersPCDesktopTest1AccountLogin.aspx.vb 10  Active

Here is my codebehind for the said error:

 Protected Sub Login_Authenticate(sender As Object, e As AuthenticateEventArgs) Handles Login.Authenticate
        Dim Username As String = Login.UserName
        Dim password As String = Login.Password
        Dim SQLCommand As String = "SELECT level FROM users WHERE (username= '" &
                        Username & "' AND pw = '" & password & "')"
        Dim level As String
        Dim con As MySqlConnection = New MySqlConnection()
        con.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings("test").ToString()
        Dim cmd As MySqlCommand = New MySqlCommand(SQLCommand, con)
        con.Open()
        If cmd.ExecuteScalar() = Nothing Then
            level = ""
        Else
            level = cmd.ExecuteScalar().ToString()
        End If
        con.Close()
        If level = "B" Or level = "G" Then
            Session("Level") = level
            Session("User") = Username
            FormsAuthentication.RedirectFromLoginPage(Username, False)
        Else
            Login.FailureText = "Try Again"
        End If

    End Sub

I first thought it was because I used = instead of 'Is' in If cmd.ExecuteScalar() = Nothing Then But changing it doesn't really affect it. Can anyone help me out with this? Thanks in advance, DeBakker