Hi. I am able to display all the attachments related to a customer portal user. But the problem is that, when user clicks on that attachment link to download, it says INSUFFICIENT PREVILIGES. Here is what I am using .

<a href="{!URLFOR($Action.Attachment.Download, att.id)}" >{!att.name}</a>

But the same works in a normal vf page that is for a normal contact withoutr any authentication.

Thanks for any help.