Attachments

Hi!
I making site for people, where they can exchange files (doc, txt, xls). First of all, I use plugin “Article Directory” and I created special page, where users can make posts. People willn’t need be in admin part of site. But I cann’t make button for attachments. I used different plugins, but they all work in admin part of site, but donn’t work on page. I must show site today, but it doesn’t work. Help me please. Tell good plugin or special code for this..