Nejde zmazat CD RW

Mam Greenie linux. Na CD napalovacke mi nejde zmaza cd rw. Skusal som to cez Brasero ("no available disk") aj cez GnomeBaker (dlho robil a nakoniec Error) a nic. Nakoniec som nainstaloval k3b a vypisalo toto:
System
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K3b Version: 1.0.5

KDE Version: 3.5.10
QT Version: 3.3.8b
Kernel: 2.6.27-7-generic
Devices
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SONY CD-RW CRX100E 1.0j (/dev/scd0, ) [CD-R, CD-RW, CD-ROM] [Error] [SAO, TAO]

Used versions
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cdrecord: 1.1.8

cdrecord command:
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/usr/bin/wodim -v gracetime=2 dev=/dev/scd0 speed=4 -tao -eject blank=fast -force

cdrecord
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/usr/bin/wodim: Operation not permitted. Warning: Cannot raise RLIMIT_MEMLOCK limits.

scsidev: '/dev/scd0'
devname: '/dev/scd0'
scsibus: -2 target: -2 lun: -2
Error trying to open /dev/scd0 exclusively (Device or resource busy)... retrying in 1 second.
Error trying to open /dev/scd0 exclusively (Device or resource busy)... retrying in 1 second.
Error trying to open /dev/scd0 exclusively (Device or resource busy)... retrying in 1 second.
Error trying to open /dev/scd0 exclusively (Device or resource busy)... retrying in 1 second.
Error trying to open /dev/scd0 exclusively (Device or resource busy)... giving up.
/usr/bin/wodim: Device or resource busy.
Cannot open SCSI driver!
For possible targets try 'wodim --devices' or 'wodim -scanbus'.
For possible transport specifiers try 'wodim dev=help'.
For IDE/ATAPI devices configuration, see the file README.ATAPI.setup from
the wodim documentation.
TOC Type: 1 = CD-ROM

Prosim o radu. Som zaciatocnik. Skusal som cez Wine aj free programy pre Windows a tam som sice videl cd mechaniku, ale dalej ma to nepustilo - nemohol som kliknut na OK.
Dakujem