Thank you so much for your help. I installed/reinstalled the driver 2 more times - with no luck - still no signal. I had checked the device driver before - and, again, it showed no problems. I took your advice and installed the driver and impserve on another computer - and the device worked fine - which narrowed the issue down to it being a problem with my laptop. I finally tracked the problem down to a firewall issue (which made no sense, because the driver only stopped working recently and the firewall has always been there) - but when I shut the firewall down and then reinstalled the driver and impserve, and then restarted the firewall, the driver worked. So, the problem is solved - I guess....