cd record problem

I am having trouble burning cds to my plextor cd-r px-w4824a

Gnomebaker produces the error messages below, when I try.

Thanks in advance.

cheers, Paul

cdrecord: No write mode specified.
cdrecord: Asuming -tao mode.

cdrecord: Continuing in 5 seconds...
cdrecord: Cannot allocate memory. WARNING: Cannot do mlockall(2).
cdrecord: WARNING: This causes a high risk for buffer underruns.
cdrecord: Operation not permitted. WARNING: Cannot set RR-scheduler

cdrecord: WARNING: This causes a high risk for buffer underruns.
scsidev: '/dev/hdd'
devname: '/dev/hdd'
scsibus: -2 target: -2 lun: -2
Linux sg driver version: 3.5.27

SCSI buffer size: 64512
cdrecord: Operation not permitted. Cannot send SCSI cmd via ioctl

NOTE: This version contains the OSS DVD extensions for cdrtools and thus may
have bugs related to DVD issues that are not present in the original
cdrtools. Please send bug reports or support requests to
http://bugzilla.redhat.com/bugzilla The original cdrtools author should
not be bothered with problems in this version.
TOC Type: 3 = CD-ROM XA mode 2
Using libscg version 'schily-0.8'.
atapi: 1
Device type : Removable CD-ROM
Version : 0
Response Format: 1
Vendor_info : 'PLEXTOR '
Identifikation : 'CD-R PX-W4824A'
Revision : '1.01'
Device seems to be: Generic mmc CD-RW.
Current: 0x0009
Profile: 0x0008
Profile: 0x0009 (current)
Profile: 0x000A

--
----------------------------------------------------------------
cheers, Paul - VA7NT - email: va7nt@xxxxxxxxx

"Those who hear not the music, think the dancers mad."

“Tolerance becomes a crime when applied to evil.” - Thomas Mann

--
----------------------------------------------------------------
cheers, Paul - VA7NT - email: va7nt@xxxxxxxxx

"Those who hear not the music, think the dancers mad."

“Tolerance becomes a crime when applied to evil.” - Thomas Mann