Seguro que tienes algo así en tu global.asax.
Cita: Public Class Global
Inherits System.Web.HttpApplication
Public Sub New()
MyBase.New()
'This call is required by the Component Designer.
InitializeComponent()
End Sub
'Required by the Component Designer
Private components As System.ComponentModel.IContainer
'NOTE: The following procedure is required by the Component Designer
'It can be modified using the Component Designer.
'Do not modify it using the code editor.
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
components = New System.ComponentModel.Container()
End Sub
Sub Session_Start(ByVal sender As Object, ByVal e As EventArgs)
'Tu codigo
End Sub
Porque a mi me funciona de esta forma perfectamente..
Salu2