On FC10 not recognizing a USB DVD/W drive

I have a new FC10 AMAHI server (amahi.org) with gnome desktop and k3b 
(installed via yumex).

I installed a Samsung USB DVD writer on the system and k3b is reporting 
that there is no CD or DVD drive on the system.

The following commands work just fine:

cdrdao read-cd --device /dev/scd0 --datafile My-CD.bin My-CD-toc

cdrdao write --device /dev/scd0 --driver generic-mmc-raw My-CD-toc


I was told by the amahi lead developer that his DVD writer was /dev/sr0 
and to it check out with:

dmesg | grep sr

And this generates:

Driver 'sr' needs updating - please use bus_type methods
sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
sr 2:0:0:0: Attached scsi CD-ROM sr0
sr 2:0:0:0: Attached scsi generic sg1 type 5
end_request: I/O error, dev sr0, sector 0
Buffer I/O error on device sr0, logical block 0
Buffer I/O error on device sr0, logical block 1
Buffer I/O error on device sr0, logical block 2
Buffer I/O error on device sr0, logical block 3
Buffer I/O error on device sr0, logical block 4
Buffer I/O error on device sr0, logical block 5
Buffer I/O error on device sr0, logical block 6
Buffer I/O error on device sr0, logical block 7
end_request: I/O error, dev sr0, sector 0
Buffer I/O error on device sr0, logical block 0
end_request: I/O error, dev sr0, sector 4
Buffer I/O error on device sr0, logical block 1
end_request: I/O error, dev sr0, sector 0
Buffer I/O error on device sr0, logical block 0
end_request: I/O error, dev sr0, sector 0
Buffer I/O error on device sr0, logical block 0

I have tried the settings option in k3b to add devices and tried:

/dev/scd0
/dev/sr0
/dev/dvd
/dev/dvdrw

and in all cases k3b reports no such device.  I use k3b regularly on a 
Centos 5.3 notebook with the gnome desktop, so I have some familiarity 
with it.  But this notebook has an internal CD/W drive.

I hope someone can help me.




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