Hello Ann,
As you see, the database tables are updated. Could you please check it using the FM BBP_PD_SC_GETDETAIL. If the attachment is retrieved, then I suppose that you have attached the file to the header and hence couldnt find it in the UI. Please see that you assign it to any of the items to find it in the Webdynpro screen.
Thanks & Regards,
Karthik Babu