Problem with my query_posts request

Hi everyone,

I want to display my news except the news of the category 21. So i read in the codex that i’ve to do something like this:

query_posts($query_string . “&cat=-21&order=ASC”);

It works for the category but the order doesn’t work. The request bug only if I exclude a category. If i Do :

query_posts($query_string . “&cat=21&order=ASC”);

the order works.

Someone have an explication or a solution?

thanks a lot.