I deleted all .tap files in the work directory,then mktap telnet and twistd localhost 8080,testing on telnet localhost 8080 get message as the following: ...... 2006/12/30 14:31 CST [-] twisted.internet.error.CannotListenError: Couldn't listen on any:8080: (98, 'Address already in use'). How to free the port 8080? Thank a lot. Steve Han