If you have Skype application (Most popular chatting app for Audio/Video Conversation) installed on your development machine,and you trying to debug your asp.net application you will got this error :
“Unable to start debugging on the web server. The server committed a protocol violation. Section=ResponseStatusLine”
simply the problem happens because the skype you the same port which is used for the default web server in VS 2005.
To solve the Problem (From Skype),open skype,from tools menu-> options ->Connection Tab..... un check the option to use port 80,443..........this will solve the problem.