Hi friends I am trying to run a file upload servlet(a servlet which uploads a file from the client side on to a specified directory on server) from a tomcat server. It gives me the following error "Apache Tomcat/4.0.1 - HTTP Status 503 - Servlet invoker is currently unavailable" Since its a file upload, i use the "POST" method to invoke my servlet!!! PLEASE HELP!!!! regards akhiboy.