Anonymous access to xml forms

Hi,

I have created an xml form and 2 iviews one to display and one to create new document (news) using the form.

I have assigned anonymous autscheme to the iview that displays the news. It work well when we access the portal as anonymous user but when I click on the link of one news to display the details, the portal display the login screen for authentification.

I think there's something to do with the com.sap.km.cm.xmlformpreview that is used to display the news but I'm not found what.

Thanks for your help.

Emmanuel