You don't have hardware drivers installed (chek in Control Panel for Jungo hardware if existing)
Hard REMOVE installation.
Don't plug hardware yet and start CIS871 setup
Now connect USB and launch program and choose driver when asked in Driver folder in Cas interface working directory
If it is not working try on Add legacy hardware from Control Panel and check for a Jungo Windrive in same folder or download file from here.
I got some problem in 64bit version solved by-passing automatic installation and using instead a brute force method by hardware legacy (twice) and it works finally. It should work much easyer in 32bit version