DSL-N :: mount cd's or usbstick?

Hello,
I've installed dsl-n rc4 to my HD.
It seems to work fine (except for wireless).
But I can't mount cd's or an usbstick.
They don't show up in the mount tool.
cdrom is always in de mnt directory, the folder stays empty.

This is not normal, right?
What can I do about it?

Blackdrive

To mount a usb stick, type:

mkdir /mnt/sda1
mount -t vfat /dev/sda1 /mnt/sda1

If sda1 doesn't work, try sda2, sda3 or sdb1, etc

hm, all I get is:
"mount: /dev/sda1 is not a valid block device"
and the same for the other possibilities.
But I use /mnt/sda1 everytime, also when I try to mount /dev/sda3 to that directory. Is that a problem?

Isn't there a way I can see what I should mount?

I guess if you type dmesg and look through the output you should see something after you plug in your usb stick.

original here.