Sticky posts don't show up

Hi guys, i hope you can help me ??

So i have this simple query

query_posts(array( 'posts_per_page' => -1 , 'cat' => 3 ));

and the Loop is closed whit wp_reset_query().

But if i flag a post as “sticky”, it doesn’t show up as first post, but it is treated as normal post.

What should i do? Thanks for all! ??