The possible causes are a badly configured global.asa file or a database connection isn’t being closed properly.
First report the fault to us so we can unload the web site application pool, this is will release resources and allow your site to function again but it doesn’t cure the problem. Unless the site is stress tested over a period of time to simulate a multi-site server you may not be able to replicate this error on your local system.
Check the global.asa file for configuration errors.
If the site uses a database ensure each and every connection is closed properly, under load calls to the database page can result in this error being generated and the site stops working. Ensure that you open and close the database connection as quickly as possible and preferably before rendering any HTML elements. Also, check that page redirects are made after the database has been closed.
VB Example:
Set Conn = Server.CreateObject(