Hi Dave, thanks.
I already emailed Weatronic and had a very quick reply from Alwin Mueller - Weatronic Support. But it didn't help.

I followed the manual exactly and all went well to page 8.
But page 9 didn't happen.
the "found new hardware wizard" could not find the necessary software on the CD, or the hard drive, and refused to talk to me any more.
I will try again to Axel.
Alasdair