Janine
Attachments requires a file-storage package instance to store files in to be associated with it. Forums has always required attachments, but it never set it self up automatically so you have to mount attachments and hook it up to a file-storage instance manually.
Really each user should end up with a folder for this stuff, or attachments should show all file-storage folders a user can see or something similar.
Another option is to not use file-storage at all and just associate an uploaded file directly with the forum post by setting cr_items.parent_id to the message_id.
Sorry this doesn't fix things. I do know that I have a client install that uses attachments with a custom package that shouldn't rely of dotlrn.
