The following works just fine on a Windows XP machine. The spaces are not an issue. I am running this as an administrator from a command line. Check out the security permissions on the registry keys that you are wanting to read. This is even more important if you are using the code from a web server.

#! /usr/bin/perl -w

use strict;
use warnings;

my $Registry;
use Win32::TieRegistry 0.20 (
    TiedRef => \$Registry, Delimiter => "/",
    ArrayValues=>1,
    qw( REG_SZ REG_EXPAND_SZ REG_DWORD REG_BINARY REG_MULTI_SZ KEY_REA
+D KEY_WRITE KEY_ALL_ACCESS ),
    );
    
my $winkey= $Registry->{"CUser/Software/Microsoft/Internet Account Man
+ager/"};

print keys(%$winkey);
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