Hi,

the only thing which comes to my mind at the moment is the following: In the depth of REST::Client headers are handled by HTTP::Headers. This module makes some "header sanitizing" which could cause your problem. Look here:

#!/usr/bin/perl
use warnings;
use strict;

use HTTP::Headers;

my $h = HTTP::Headers->new;

$h->header('Content-Type' => 'text/plain');  # set
$h->header('u' => 'user');
$h->header('p' => 'password');
print $h->as_string, "\n";
[download]

Your headers 'u' and 'p' are converted to uppercase.

Just a guess. Besides of that: Custom headers should use the X-blabla-namespace, in your case e.g. X-u and X-p.

McA