Start by upgrading your setup. The latest versions are: ioA v1.2.0, ioZS v2.0.5, and ioFTPD Beta-5.8.5r.
Since you're using a registered version of ioFTPD, please enter your ioftpd.com/members account information in your vBulletin user profile. This allows us to verify that you have in fact purchased ioFTPD.
http://www.ioftpd.com/board/member.p...on=editprofile