Doesn't work in XP x64?

copied from system info:

WindowBlinds version : WindowBlinds 6.3 (build 67 x86) - 64 bit OS

WindowBlinds is installed correctly on this PC
WindowBlinds appears to be activated on this PC
Your machine supports per pixel borders on WindowBlinds skins.

(Plug and Play Monitor) 1 is attached to NVIDIA GeForce 7900 GT/GTO
(Plug and Play Monitor) 2 is attached to NVIDIA GeForce 7900 GT/GTO

Wblind.dll      2008/09/22 17:59:20
Wblind64.dll      2008/04/28 12:35:01
Wbsrv.dll      2008/04/28 12:35:23
Wbconfig.exe      2008/09/22 17:59:32
Wbload.exe      2008/04/28 12:35:14
Wbhelp.dll      2008/04/28 12:35:07
Wbui.dll      2008/04/28 12:35:05
Tray.dll           2008/04/28 12:35:21
Wbload.dll           2007/09/26 11:53:28
Screen.exe      2008/07/22 11:10:09

Problem: Application windows (such as Firefox) don't skin properly. there is no top window bar (I can't remember the name of it, it's where the red x is to close the window). This also make it impossible to move the application. Windows folders (such as My Documents) work fine, look fine. Anyone have any ideas?

Here is a graphical representation of my issue: