Need help in making capabilities

Hi,

I am new to geodirectory. I just want one thing, letting subscribers to add, edit and delete places.

I have done the following:
1. Added $capabilites array to $place-default which I suppose is the argument to register_post_type
2. Changed capability_type to ‘place’ in the same $place_default
3. Added filter to map_meta_cap as a function “places_map_meta_cap”

Here is the code demonstrating the same.
//capabilities array
$capabilities = array(
    'publish_posts' => 'publish_places',
    'edit_posts' => 'edit_places',
    'edit_others_posts' => 'edit_others_places',
    'delete_posts' => 'delete_places',
    'delete_others_posts' => 'delete_others_places',
    'read_private_posts' => 'read_private_places',
    'edit_post' => 'edit_place',
    'delete_post' => 'delete_place',
    'read_post' => 'read_place'
);

//I think $place_default is the argument to register_post_type() so I added $capabilities array to it and changed capability_type to 'place'
			
        $place_default = array(
            'labels' => $labels,
            'can_export' => true,
            'capability_type' => 'post',
            'description' => 'Place post type.',
            'has_archive' => $listing_slug,
            'hierarchical' => false,
            'map_meta_cap' => true,
            'menu_icon' => $menu_icon,
            'public' => true,
			'capability_type' => 'place',
            'capabilities' => $capabilities,
            'query_var' => true,
            'rewrite' => array('slug' => $listing_slug , 'with_front' => false, 'hierarchical' => true, 'feeds' => true),
            'supports' => array('title', 'editor', 'author', 'thumbnail', 'excerpt', 'custom-fields', 'comments', /*'revisions', 'post-formats'*/),
            'taxonomies' => array('gd_placecategory', 'gd_place_tags'));

After adding $capabilities array and changing capability type I added a filter to map_meta_cap by adding a function called “places_map_meta_cap”

Here is the code of the same:

/* MAP META CAPABILITIES */

add_filter( 'map_meta_cap', 'places_map_meta_cap', 10, 4 );

function places_map_meta_cap( $caps, $cap, $user_id, $args )
{

    if ( 'edit_place' == $cap || 'delete_place' == $cap || 'read_place' == $cap ) {
        $post = get_post( $args[0] );
        $post_type = get_post_type_object( $post->post_type );
        $caps = array();
    }

    if ( 'edit_place' == $cap ) {
        if ( $user_id == $post->post_author )
            $caps[] = $post_type->cap->edit_posts;
        else
            $caps[] = $post_type->cap->edit_others_posts;
    }

    elseif ( 'delete_place' == $cap ) {
        if ( $user_id == $post->post_author )
            $caps[] = $post_type->cap->delete_posts;
        else
            $caps[] = $post_type->cap->delete_others_posts;
    }

    elseif ( 'read_place' == $cap ) {
        if ( 'private' != $post->post_status )
            $caps[] = 'read';
        elseif ( $user_id == $post->post_author )
            $caps[] = 'read';
        else
            $caps[] = $post_type->cap->read_private_posts;
    }

    return $caps;
}

I had followed this post: http://stackoverflow.com/questions/8198038/wordpress-capabilities-for-custom-post-types

to do this and I think the procedure and execution is perfect but when I checked in user-role-editor plugin none capabilities were displayed I wonder why. Please please help me in this.