[imp] attachement download broken for mpeg file

[David Chang]

Hi all:
I have a problem about mpeg format attachement.
When open a mail with mpeg format attachement in IE 5/6,If i click download 
icon directly ,then Windows Media Player popup and say: "Unable to connect 
server".

If i right click download icon to select "save as target" and use Windows Media 
Player open it,everything fine.

David Chang

ENV:
IMP 4.0 head+php 4.3,WU-IMAP 2001a