Cita: The Path argument is a string specifying either the absolute or relative path of the ASP page being called. The file name must be included in the path. The entire Path must be enclosed inside a pair of quotes. The Path argument cannot include a query string, however, any query string that was available to the calling ASP page will be available to the called ASP page.
O sea... no se puede meter un querystring en un server.execute. intentá lo mismo pero con server.transfer (nunca lo usé)