I have a PF250U2 working nicely for me over the past few months on my vista laptop. However, when I plug my device in today, my pc says that USB device not recognized. I suspect that there is a problem with the device driver as it is listed as an unknown device. Under device status, it says that there is no driver installed for this device. May I know where can I find a driver for this? Pls help! Thanks in advance.