I have both a 1095 and a 1098. Mostly they are recognized as soon as I connect them, but sometimes it takes awhile. I don't know the reason for it but I learned that if I go off and take care of something else or just go have a coffee after plugging them in and come back in 5-10 minutes, they have been recognized and show up in the device manager they way they're supposed to. It hasn't failed since I've been doing this. I don't connect them often because updating my programming on the SD card is so much faster with a reader. That too varies from being recognized as soon as it's plugged into the USB port to failing and requiring several pull-and-stick attempts, to just sitting there for a few minutes and finally being recognized. For that reason (my camera card does the same thing in this reader) I'm suspecting a Windows, rather than Whistler, problem, but I have no way to prove that so it's just speculation.
Just a suggestion you might try.