Changes into Windows Classic Themes

Everytime I apply a theme other that Aero or Windows Classic, it changes into Windows Classic Theme.

Your computer has a Windows Experience Index base score of 3.5
Your Windows Graphics Experience score is 3.5

WindowBlinds version : WindowBlinds 6.0 (build 49 x86 - Vista Edition)

WindowBlinds is installed correctly on this PC
WindowBlinds appears to be activated on this PC
(Generic PnP Monitor) 1 is attached to Mobile Intel(R) 965 Express Chipset Family

Wblind.dll         2007/10/01 12:34:20
Wbsrv.dll         2007/09/24 15:57:26
Wbconfig.exe         2007/10/01 18:09:33
Wbload.exe         2007/09/27 16:42:44
Wbhelp.dll         2007/07/11 15:06:07
Tray.dll              2007/09/12 18:52:21
Wbload.dll              2007/09/12 18:58:28
Screen.exe         2007/09/30 15:18:24


Please help because I don't wan't to waste $20!