Node Reference argument

First off sorry for what my searches appears to be a popular issue. But I can't find the exact solution.
I have 2 content types, Site and Circuit. Using Node reference to associate the specific nodes to eachother.
I've got the view embedded for the content type. I'm trying to get only the circuit's associated with the site to show in the embedded view. I did this with the $args[0] = arg(1); and argument pointing to the noderef in my 5.x but I can't get this to work in 6.x

I got the argument to in preview but not for the embedded 'live' node. On my live it gives me a table with all circuits.

Also I'm using Node ID from the URL, but if I decide to use Path later, will NodeID no longer work?
I'm using nodeID just to get to a solution, if there's another way I'm open to it.

Any help would be great. Thanks.

$view = new view;
$view->name = 'Circuit_List';
$view->description = 'Circuit List for embedding in Site details';
$view->tag = 'embed';
$view->view_php = '';
$view->base_table = 'node';
$view->is_cacheable = FALSE;
$view->api_version = 2;
$view->disabled = FALSE; /* Edit this to true to make a default view disabled initially */
$handler = $view->new_display('default', 'Defaults', 'default');
$handler->override_option('fields', array(
'title' => array(
'label' => 'Circuit ID',
'alter' => array(
'alter_text' => 0,
'text' => '',
'make_link' => 0,
'path' => '',
'link_class' => '',
'alt' => '',
'prefix' => '',
'suffix' => '',
'target' => '',
'help' => '',
'trim' => 0,
'max_length' => '',
'word_boundary' => 1,
'ellipsis' => 1,
'html' => 0,
'strip_tags' => 0,
),
'empty' => '',
'hide_empty' => 0,
'empty_zero' => 0,
'link_to_node' => 1,
'exclude' => 0,
'id' => 'title',
'table' => 'node',
'field' => 'title',
'relationship' => 'none',
),
));
$handler->override_option('arguments', array(
'field_circuit_site_nid' => array(
'default_action' => 'ignore',
'style_plugin' => 'default_summary',
'style_options' => array(),
'wildcard' => 'all',
'wildcard_substitution' => 'All',
'title' => '',
'breadcrumb' => '',
'default_argument_type' => 'fixed',
'default_argument' => '',
'validate_type' => 'node',
'validate_fail' => 'not found',
'break_phrase' => 0,
'not' => 0,
'id' => 'field_circuit_site_nid',
'table' => 'node_data_field_circuit_site',
'field' => 'field_circuit_site_nid',
'validate_user_argument_type' => 'uid',
'validate_user_roles' => array(
'2' => 0,
),
'override' => array(
'button' => 'Override',
),
'relationship' => 'none',
'default_options_div_prefix' => '',
'default_argument_fixed' => '',
'default_argument_user' => 0,
'default_argument_php' => '',
'validate_argument_node_type' => array(
'site' => 'site',
'circuit' => 0,
'cluster_member' => 0,
'firewall' => 0,
'gateway_cluster' => 0,
'page' => 0,
'router' => 0,
'serv_provider' => 0,
'site_sec' => 0,
'story' => 0,
),
'validate_argument_node_access' => 0,
'validate_argument_nid_type' => 'nid',
'validate_argument_vocabulary' => array(),
'validate_argument_type' => 'tid',
'validate_argument_transform' => 0,
'validate_user_restrict_roles' => 0,
'validate_argument_php' => '',
),
));
$handler->override_option('filters', array(
'type' => array(
'operator' => 'in',
'value' => array(
'circuit' => 'circuit',
),
'group' => '0',
'exposed' => FALSE,
'expose' => array(
'operator' => FALSE,
'label' => '',
),
'id' => 'type',
'table' => 'node',
'field' => 'type',
'relationship' => 'none',
),
));
$handler->override_option('access', array(
'type' => 'none',
));
$handler->override_option('cache', array(
'type' => 'none',
));
$handler->override_option('title', 'Circuits');
$handler->override_option('style_plugin', 'table');
$handler = $view->new_display('page', 'Page', 'page_1');
$handler->override_option('path', 'circuitlistembed');
$handler->override_option('menu', array(
'type' => 'none',
'title' => '',
'description' => '',
'weight' => 0,
'name' => 'navigation',
));
$handler->override_option('tab_options', array(
'type' => 'none',
'title' => '',
'description' => '',
'weight' => 0,
'name' => 'navigation',
));