I was able to install it on Windows Vista, but it doesn't work properly.

DAQWORX won't work properly on Windows Vista if you install it in the Program Files folder. When installing for the first time, install it in a folder other than the Program Files folder (the default is the DAQWORX folder). If you have already installed it in the Program Files folder on Windows 2000 or XP, reinstall DAQWORX to a different folder before upgrading to Windows Vista.