Httpmodule still executed even if remove using <remove> config entry

[sksmart]

I have added httpmodule but when I am trying to remove it in subdirectory web.config of subdirectory it still get executed.

Public Sub Init(ByVal context As System.Web.Http Application) Implements System.Web.IHtt pModule.Init

'add a handler for the PostAutheticati onRequest event. This fires just after authentication has occurred
AddHandler context.PostAut henticateReques t, AddressOf HandlePostAuste nticationReques t

End Sub
Private Sub HandlePostAuste nticationReques t(ByVal sender As Object, ByVal e As EventArgs)
Dim application As HttpApplication
Dim req As HttpRequest

Try
application = DirectCast(send er, HttpApplication )

req = application.Req uest

If req.IsAuthentic ated Then
Exit Sub
End If

Dim redirectUrl As New StringBuilder(" ")
redirectUrl.App end(FormsAuthen tication.LoginU rl)
redirectUrl.App end(AUTHENTICAT ION_LOGIN_REDIR ECT_QUERYSTRING )
redirectUrl.App end(req.Url.Abs oluteUri())

application.Con text.Response.R edirect(redirec tUrl.ToString)
End Sub

In the main web.config I added the following tag:

<httpModules>
<add type="Project.A uthorisationRed irect" name="Authorisa tionRedirect" />
</httpModules>

In the subdiretory I added
<httpModules>
<remove name="Authorisa tionRedirect" />
</httpModules>
But it still gets executed. I have tried using clear but not working.

Thanks
Sk