UBB.Developers Forums UBB.threads 7 Development How Do I? File Attachments are not working

Info
UBBThreads:
- 6.4.1
IIP:
- 5.4.5
MODS:
- Download Restriction 1.0
- Per-Forum Attachments
Forum:
http://www.aerynth.com/ubbthreads/postlist.php?Cat=0&Board=downloads

I have set up a forum where only admin can post but all can view and, using the Per-Forum Attachments Mod, made it my download forum.

When I go to upload a file (making sure it is an allowed type; .zip) it seems to work fine. When I try to use this attachment, it comes up as a bad page. I looked in my attachments directory and, sure enough, nothing new there.

Any thoughts?