Need help!!!

I added a field called date (a date time stamp)….The movies should then be queried based on the date. If the date is less than or equal to today, the movies will show on the now playing page. If the date is greater, then they will show on the coming soon page. I need to simply get the query string to work correctly

<?php query_posts (‘cat=-12&meta_key=date&meta_value>=’.time());?>

The problem I have is that it pulls in numerous copies of all of the posts.