No graba bien Iso

Hola,pues que no me graba bien las imágenes Iso y la salida que me da al terminar la grabación es esta:

K3b Version: 1.0.3

KDE Version: 3.5.8
QT Version: 3.3.7
Kernel: 2.6.22-14-generic
Devices
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TSSTcorp CD/DVDW TS-L632D ac00 (/dev/scd0, ) [CD-R, CD-RW, CD-ROM, DVD-ROM, DVD-R, DVD-RW, DVD-R DL, DVD+R, DVD+RW, DVD+R DL] [DVD-ROM, DVD-R secuencial, DVD-R Doble capa secuencial, DVD-R doble capa salteado, DVD-RAM, DVD-RW sobreescritura restringida, DVD-RW secuencial, DVD+RW, DVD+R, DVD+R doble capa, CD-ROM, CD-R, CD-RW] [SAO, TAO, En bruto, SAO/R96P, SAO/R96R, RAW/R16, RAW/R96P, RAW/R96R, Sobreescritura restringida, Salto de capa]

Used versions
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cdrecord: 1.1.6

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
Linux sg driver version: 3.5.27
Wodim version: 1.1.6
SCSI buffer size: 64512
Beginning DMA speed test. Set CDR_NODMATEST environment variable if device
communication breaks or freezes immediately after that.
TOC Type: 1 = CD-ROM
Driveropts: 'burnfree'
Device type : Removable CD-ROM
Version : 5
Response Format: 2
Capabilities :
Vendor_info : 'TSSTcorp'
Identification : 'CD/DVDW TS-L632D'
Revision : 'ac00'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
Current: 0x000A (CD-RW)
Profile: 0x0015 (DVD-R/DL sequential recording)
Profile: 0x0016 (DVD-R/DL layer jump recording)
Profile: 0x002B (DVD+R/DL)
Profile: 0x001B (DVD+R)
Profile: 0x001A (DVD+RW)
Profile: 0x0014 (DVD-RW sequential recording)
Profile: 0x0013 (DVD-RW restricted overwrite)
Profile: 0x0012 (DVD-RAM)
Profile: 0x0011 (DVD-R sequential recording)
Profile: 0x0010 (DVD-ROM)
Profile: 0x000A (CD-RW) (current)
Profile: 0x0009 (CD-R)
Profile: 0x0008 (CD-ROM)
Profile: 0x0002 (Removable disk)
Using generic SCSI-3/mmc CD-R/CD-RW driver (mmc_cdr).
Driver flags : MMC-3 SWABAUDIO BURNFREE
Supported modes: TAO PACKET SAO SAO/R96P SAO/R96R RAW/R16 RAW/R96P RAW/R96R
Drive buf size : 1306624 = 1276 KB
FIFO size : 12582912 = 12288 KB
Speed set to 1764 KB/s
Track 01: data 697 MB
Total size: 800 MB (79:19.17) = 356938 sectors
Lout start: 800 MB (79:21/13) = 356938 sectors
Current Secsize: 2048
ATIP info from disk:
  Indicated writing power: 3
  Reference speed: 6
  Is not unrestricted
  Is erasable
  Disk sub type: High speed Rewritable (CAV) media (1)
  ATIP start of lead in: -11745 (97:25/30)
  ATIP start of lead out: 359848 (79:59/73)
  1T speed low: 4 1T speed high: 10
  2T speed low: 4 2T speed high: 0 (reserved val 6)
  power mult factor: 1 5
  recommended erase/write power: 5
  A1 values: 24 1A D8
  A2 values: 26 B2 4A
Disk type: Phase change
Manuf. index: 40
Manufacturer: INFODISC Technology Co., Ltd.
Blocks total: 359848 Blocks current: 359848 Blocks remaining: 2910
Starting to write CD/DVD at speed 10.0 in real SAO mode for single session.
Last chance to quit, starting real write in 2 seconds.
   1 seconds.
   0 seconds. Operation starts.
Waiting for reader process to fill input buffer ... input buffer ready.
Performing OPC...
Sending CUE sheet...
Writing pregap for track 1 at -150
Starting new track at sector: 0
Track 01: 0 of 697 MB written.
Track 01: 1 of 697 MB written (fifo 100%) [buf 100%] 0.4x.
Track 01: 2 of 697 MB written (fifo 100%) [buf 100%] 10.3x.

..................................
..................................

Track 01: 696 of 697 MB written (fifo 100%) [buf 100%] 10.2x.
Track 01: 697 of 697 MB written (fifo 100%) [buf 100%] 10.5x.
Track 01: Total bytes read/written: 731009024/731009024 (356938 sectors).
Writing time: 497.713s
Average write speed 9.7x.
Min drive buffer fill was 98%
Fixating...
Fixating time: 27.163s
/usr/bin/wodim: fifo had 11515 puts and 11515 gets.
/usr/bin/wodim: fifo was 0 times empty and 11302 times full, min fill was 95%.
BURN-Free was never needed.

cdrecord command:
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/usr/bin/wodim -v gracetime=2 dev=/dev/scd0 speed=10 -dao driveropts=burnfree -eject -data -tsize=356938s -

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Supongo que el error es este:/usr/bin/wodim: Operation not permitted. Warning: Cannot raise RLIMIT_MEMLOCK limits.
Pero no se si se puede solucionar..
Gracias.