Does your Bt 1800 have a built in modem? If so that's your problem because you do not need to connect it with the USB cable otherwise it's not 'wireless'. I did exactly the same, as soon as I removed the USB cable it worked on both our computers.
Samsung Galaxy S8 review
1995-2015: How technology has changed the world in 20 years
This poetic animation about monsters is illustrated in a Van Gogh painterly style
Apple predictions 2017
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.