BuddyPress.org

i have created a custom page in buddy press.
First i created bp-custom.php file and added nav item and sub nav item in it. After it created a screen content function like this:

function bp_custom_user_nav_item() {
    global $bp;

    $args = array(
        'name'                    => __( 'Gallery', 'buddypress' ),
        'slug'                    => 'gallery',
        'default_subnav_slug'     => 'gallery',
        'position'                => 100,
        'show_for_displayed_user' => false,
        'screen_function'         => 'bp_custom_user_nav_item_screen',
        'item_css_id'             => 'gallery-id'
    );

    bp_core_new_nav_item( $args );
}

add_action( 'bp_setup_nav', 'bp_custom_user_nav_item', 99 );

function bp_custom_gallery_sub_nav() {
    global $bp;
    $parent_slug = 'gallery';

    //Add subnav item    
    bp_core_new_subnav_item( array(
                                 'name'            => __( 'Gallery' ),
                                 'slug'            => $parent_slug,
                                 'parent_url'      => $bp->loggedin_user->domain . $parent_slug . '/',
                                 'parent_slug'     => $parent_slug,
                                 'screen_function' => 'bp_custom_user_nav_item_screen',
                                 'position'        => 10,
                                 'link'            => $bp->loggedin_user->domain . $parent_slug . '/',
                                 item_css_id       => 'galley-main'
                             ) );
}

add_action( 'bp_setup_nav', 'bp_custom_gallery_sub_nav' );

function bp_custom_user_nav_item_screen() {
    add_action( 'bp_template_content', 'bp_custom_screen_content' );
    bp_core_load_template( apply_filters( 'bp_core_template_plugin', 'members/single/plugins' ) );
}

function bp_custom_screen_content() {
    echo "My content";
}

When user loged in user can view this page.
I want to check page of other user. Like you can visit profile page of other user. It shows page not found.
How can i all members can see each others page.