usb mp3player doesn't automount

[Bjarne Wichmann Petersen]

Hi

I've got an usb mp3player that doesn't automount. I get this error, when I try 
to access it from konqueror:

Could not mount device.
The reported error was:
mount: couldn't find /dev/sda in /etc/fstab or /etc/mtab

I can mount the mp3player as root though. I've also got another usb-stick that 
automounts just fine.

How do I get the device to automount?

Bjarne