PCMCIA problems

We have a user who uses PCMCIA cards a lot. He recently upgraded from NT to Windows 2000 and now the reader will not work. It used to assign a drive letter to the drive every time a card was inserted. Now it does recognize something is there, butwill not assign a drive letter, making it impossible to view the data on the card. We’ve downloaded a few products from the website of the manufacturer and had no luck. Can anyone help us out?