OK, I answer myself. I should use "from twisted.protocols import http" instead of "from twisted.internet import http". Excuse me for the bothering. Iap -----Original Message----- From: Iap, Singuan [mailto:iap_yeh@thecus.com] Sent: Sunday, February 19, 2006 4:39 PM To: 'Twisted general discussion' Subject: v2006-2-12 ImportError: IAddress Hi, I have no idea if this is a bug? Just download 2006-2-12 and my existed script complains the ImportError of IAddress. (twisted.internet.interfaces) Any hints? Iap