Custom IWP reverts on Log Out/Error

[David Mars]

I have a custom IWP page as per Mikhail Edoshin's guidelines at http://edoshin.skeletonkey.com/iwp/index.html and it works as intended going INTO my database (Thanks Mikhail!). But when the user logs out or if the user types in the wrong password, the user is returned to the default FMP IWP interface, which is a bit jarring. Is this something that can be changed? I'm running this on a Mac with 8.5 Advanced, no Server. Thanks, David