open my $READ, '<', './config.xml' or die $!;
my $parser = 'XML::Simple'->new;
my $doc = $parser->XMLin(do { local $/; <$READ> }, ForceArray => qr/Resource/,
                                                   KeyAttr    => { server => 'name' },
                                                   KeepRoot   => 1); # I fixed the options.