Attached document for data column in BPS Web application

Hi,

I have created layout for a BPS application, the layout has been configured to have the ability to allow the used to create the attached documentd for the data column. when the user open the layout through the planning profile, the icon for those documents is displayed and can be open by click those icons. After we generated the Web applicatios, those icons are gone and the user can not open them any more.

I notice that there is document subcomponent under BPS-WB, I added that subcomponent to my web layout, it still not work.Anybody know how to display the attached documents on the Web, Is this doable?