urlrewrite using global.aspx

Question

My url is something like this http://:/cather/getfilters?id=1&desc=xxx (here id and desc may vary) i know i can use urlrewrite or handling request in Application_BeginRequest method in global.aspx. protected void Application_BeginRequest(Object sender, EventArgs e){ try { HttpContext myContext = HttpContext.Current; myContext.RewritePath("actualfile.aspx?" + myContext.Request.QueryString, true); } catch (Exception ex) { } } this code is working fine when i tested in my localhost using port number only. Its not working when i use ipaddress in my local pc or production environment. I guess only way global.asax file will be called is from the .NET engine which is called by IIS. i think IIS doesn't understand my url http://:/cather/getfilters?id=1&desc=xxx how to i set up in IIS to make understand above url and calling .NET engine. so But strange how its understanding when i use http://localhost:1987/cather/getfilters?id=1&desc=xxx call is accessing global.aspx and my code working fine. above