Strange... users cannot upload attachements?

[shaynehammy]

If someone can just give me an idea of wtf is actually going on

Users suddenly cannot upload any attachements getting the error:

vBulletin Message
zimajays, you do not have permission to access this page. This could be due to one of several reasons:
Your user account may not have sufficient privileges to access this page. Are you trying to edit someone else's post, access administrative features or some other privileged system?
If you are trying to post, the administrator may have disabled your account, or it may be awaiting activation.

Only thingthat has changed is i moved my attachements to a filke system trather than a
database system.

Usergroups > Usergroup Manager > Registered users > Can Upload Attachments - Yes

What else could i have possibly changed by mistake?

Thanks for the help