if it's not automatically mounted, you can mount it manually by creating a mountpoint (a directory) under /media/ and issuing in terminal:
sudo mount -t vfat /dev/sda1 /media/usbflash
or, if 'sudo' doesn't work, then su to become root and do
mount -t vfat /dev/sda1 /media/usbflash
where 'usbflash' would be the directory you want to mount (read and write) the usb-stick into. '-t vfat' means to use FAT32 as the filesystem, because most if not all of the usb flash memory sticks use fat32 as their filesystem..in most cases it can be dropped off, though.
EDIT: if that one above won't work, then try to use sda2, sda3, sda4 or such instead of sda1. sda1 is the first device _usually_ but not _always_. I've had many flash memory sticks that must me mounted as sda4 though there is no reason why they couldn't be sda1..I don't know why exactly. but that's a clue.
Last edited by b0uncer; 01-16-2006 at 12:40 PM.