[ILUG-BOM] problem with mounting usb drive in debian etch

Hello, i recently upgraded debian from sarge to etch (apt-get dist-upgrade), and since then my usb ain't getting detected. initially my /etc/fstab lines were as follows ### /dev/sda1 /media/usb1 vfat noauto,users,uid=500 0 0 /dev/sda2 /media/usb2 vfat noauto,users,uid=500 0 0 ### but now i get the following error: mount: special device /dev/sda1 does not exist

i checked /dev and saw that "sda?" does not exist at all. but something called "usbdev[123].1_ep[00][81]" exists. using them, however gave me the following error: mount: /media/usb1/ is not a block device

big brother google told to check /proc/partitions, but that shows only my HDD partitions, and doesn't show any information about the usb drive :(

Thanks for all the help