query_posts and conditional tag tests?

I’m having trouble getting a conditional test to work as it should, i’ve included the part of the code that seems to be relevant bellow, if the ‘Category_Cloud_Mini’ function was not there then the conditional test works, if the function is in the page before the test then every page tests as the ‘home’ page, including single & category pages,

assuming that it’s the ‘query_posts’ thing that’s causing the problem, i’d be grateful if anyone could tell me why its causing the conditional test to go wrong?

thanks for any help with this,

function Category_Cloud_Mini() {
            foreach((query_posts('showposts=25')) as $post) {
            }
        }
        Category_Cloud_Mini();

followed by:

if (is_home()) {
            echo "ON HOME PAGE";
        }
        elseif (is_single()) {
            echo "ON SINGLE PAGE";
        }
        elseif (is_category()) {
            echo "ON CATEGORY PAGE";
        }