Ok, problem solved. I´ll add the script below. Hope it´s useful for someone.
if ( is_page() ) {
$post = $wp_query->get_queried_object();
if ( $post->post_parent == 0 ){ echo "<li> » ".ucwords(str_replace("-", " ", $post->post_name))."</li>"; }
else {
$title = the_title('','', FALSE);
$ancestors = array_reverse( get_post_ancestors( $post->ID ) );
array_push($ancestors, $post->ID);
foreach ( $ancestors as $ancestor ){
if( $ancestor != end($ancestors) ){
echo '<li> » <a href="'. get_permalink($ancestor) .'">'. ucwords(str_replace("-", " ", basename(get_permalink($ancestor)))) .'</a></li>';
} else {
echo '<li> » '. ucwords(str_replace("-", " ", basename(get_permalink($ancestor)))) .'</li>';
}
}
}
} // You just missed this bracket, else this is working awesome!