attachment with imp

[edward@ita.org.mo]

Hello to you,

When I post a E-mail with a attached file using imp , there is the error
message :

Warning: File Upload Mime headers garbled [ or in
/home/webmaster/html/horde/imp/compose.php3 on line 1

Warning: Cannot add more header information - the header was already
sent (header information may be added only before any output is
generated from the script - check for text or whitespace outside PHP
tags, or calls to functions that output text) in session.inc on line 448

Warning: Cannot add more header information - the header was already
sent (header information may be added only before any output is
generated from the script - check for text or whitespace outside PHP
tags, or calls to functions that output text) in compose.php3  on line
449

Warning: Cannot add more header information - the header was already
sent (header information may be added only before any output is
generated from the script - check for text or whitespace outside PHP
tags, or calls to functions that output text) in session.inc on line 450

Warning: Cannot add more header information - the header was already
sent (header information may be added only before any output is
generated from the script - check for text or whitespace outside PHP
tags, or calls to functions that output text) in ./templates/doctype.inc
on line 8

About the three file ( compose.php3, compose.php3 and doctype.inc ) have
just be zipped and put on a Web Server at
http://home.macau.ctm.net/~edward/imp/configs.zip

Thank for your help !

Edward.