Hi Fred,

Thanks for the response!
OK -
Dell Studio 1537 (Intel P8400) running Vista SP2
DVD drive = some sort of generic device, described as "HL-DT ST-DVD GA10N ATA device"

The CDs are all originals. When I first installed it it was working fine - I catalogued 224 CDs. But now when I start up OrangeCD and try Query - Find CD by scanning, it just says Please insert Audio CD to continue. If I try Album-Scan CD it says there's no CD in the drive, but the eject function works for the CD that's in there.
Other applications such as Media player have no problems recognising the same CD.

I can't remember the original version I downloaded (and paid for) a couple of months ago, but I've tried uninstalling that and installing the latest version 6.4.2 Build 14920, but it still don't work. I bought Orange CD because I liked it, but at this rate I might have to get something else.

Steve