Linked files in Presenter 7.0.7 presentations published to Adobe Connect 8 or 9 do not appear if the filename contains CJK characters. They return a "Not Found" error. This issue does not affect files linked as attachments to the presentation, only files attached as hyperlinks.
The Adobe Engineering team is currently working on resolution for a future release of Connect. Until this issue is addressed, don't use CJK (Chinese, Japanese, and Korean) characters in the filename.