How to add several custom parameters in permalink

I have the page with URL (i.e. http://mysite.com/test) based on defined template. I need to pass 2 parameters (‘v’ and ‘b’) to this page using permalink.

I add this code to functions.php:

<?php
function add_my_var($public_query_vars) {
    $public_query_vars[] = 'v';
    $public_query_vars[] = 'b';
    return $public_query_vars;
}

add_filter('query_vars', 'add_my_var');

function do_rewrite() {
    add_rewrite_rule('^test/([^/]*)/([^/]*)/?$', 'index.php?pagename=test&v=$matches[1]&b=$matches[2]','top');
}

add_action('init', 'do_rewrite');
?>

and this to template file:

echo get_query_var('v');
echo get_query_var('b');

But when I try to access http://mysite.com/test/example1/example2/ I get 404 error. Where am I wrong?