Custom List Display Form -Attachment Missing

When you create a custom display form in SharePoint Designer for  a Custom list, you dont' see list item attachments if it has any.
 
To show the list item attachment in display format  , place the following control in  customdisplayform.aspx using designer. 
 
<SharePoint:AttachmentsField ControlMode="Display" FieldName="Attachments" runat="server" Visible="true"/>
 
   *customdisplayform.aspx is my display form for custom list.