Yogi, I just install the attachment plugin and it's not working for me.

This is what I have in my add.html temp.:

<%if user_may_upload_attachments%> <%include include_attachment_form.html%> <%endif%>
In the Configaration I have permission set to Everyone, but the attachments form is not diplayed, unless I take the <%if%> statement out. When I upload an img. and then click on Upload Attachment, the page just refresh with no attachment shown. What am I doing wrong?