I have a 4GB memory stick PRO duo (Lexar) full with pictures which I can not download into my computer. It keeps telling me that the program is not responding. I have Windows Vista

Can someone help with this problem?

Other Lexar users have reported similar problems. Not a driver problem at all.

Lexar case sometimes interferes with insertion. Taking 1 mm off case fixes it.

See more here:
Lexar 128mb Usb Jump Drive Mass Storage Not Responding - WinDrivers Computer Tech Support Forums

Hope this helps.