httpmodule is not being invoked

Hi

Hopefully someone can help. I have written an httpmodule that does a urlrewrite. This works fine on my development machine, but it seems that the httpmodule is not being invoked when deployed on discountasp.net. The prod server is Win 2003 IIS 6.

web config section

<system.web>
<httpModules>
<add type="SEO.UrlRewriter, App_Code" name="UrlRewriter"/>
</httpModules>

my httpmodule

public class UrlRewriter : IHttpModule
{

#region IHttpModule Members

public void Init(HttpApplication context)
{
context.BeginRequest += new EventHandler(rewriteUrl);
}

public void Dispose()
{
// Nothing To Do
}
#endregion

private void rewriteUrl(object sender, EventArgs e)
{
HttpApplication myApp = (HttpApplication)sender;

HttpContext ctx = myApp.Context;

String currentPath = ctx.Request.Path;

// the URL contains this folder name
if (currentPath.ToLower().Contains("/articles/"))
{

// rewrite the URL
ctx.RewritePath("articles.aspx?article="
+ currentPath.Substring(currentPath.LastIndexOf("/") + 1).Replace("-", " ").Replace(".html", ""));
}


}