Going back to Classic Windows

Hello there, I've been looking around for customization options recently and I found WindowBlinds, so I downloaded the trial, installed it properly, and the first thing I do is to try the Leo skin. Please wait button pops up, but all it does is to reset my theme to vista, I got no clue whats wrong, do you? And to reset i to the Vista Aero theme I have to go back to the Windows menu for windows and change it. Here's my system info, im running the trial version. Your computer has a Windows Experience Index base score of 3.5 Your Windows Graphics Experience score is 3.5 WindowBlinds version : WindowBlinds 6.3 (build 109 x86 - Vista Edition) - Shareware WindowBlinds is installed correctly on this PC (Allmän PnP-bildskärm) 1 is attached to NVIDIA GeForce 8400M GS Wblind.dll 2008/09/17 10:48:00 Wbsrv.dll 2008/07/22 10:53:10 Wbconfig.exe 2008/09/17 08:05:57 Wbload.exe 2008/04/26 16:14:14 Wbhelp.dll 2008/04/26 16:14:07 Tray.dll 2008/04/26 16:14:21 Wbload.dll 2008/04/26 16:14:28 Screen.exe 2008/07/22 16:42:31 Grateful to here from any of you guys!