I have following code which tries to read the REMOTE_USER environment variable passed by IE to the server, but it's not working:

use strict;
use warnings;
use CGI;
my $q = CGI->new();
my $UserID = $ENV{"REMOTE_USER"};
print $q->header();

if($UserID){
    print "User:<b>$UserID</b>";
}
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The apache log shows

[error] Bad/Missing NTLM/Basic Authorization Header for /testarea/test
+.pl
[6275] AuthenNTLM: timed outwhile waiting for lock (key = 23754)
[download]

Anyone has some sugestion how to make this simple script work, or where to start debug?