Wodim unable to write on DL DVD Drive

[JD]

Hi, I have a DL 16X DVD drive, loaded with
a Kodak DL DVD+R blank disk.
I have no problems burning 4.3GB media. ButWodim
chokes on DL media.
When I run
$ export CDR_NODMATEST  << Because Wodim is unable to perform DMA tests.
$ wodim -v speed=2 dev=/dev/sr0 dvd.iso
wodim: No write mode specified.
wodim: Assuming -tao mode.
wodim: Future versions of wodim may have different drive dependent defaults.
TOC Type: 1 = CD-ROM
wodim: Operation not permitted. Warning: Cannot raise RLIMIT_MEMLOCK limits.
scsidev: '/dev/sr0'
devname: '/dev/sr0'
scsibus: -2 target: -2 lun: -2
Linux sg driver version: 3.5.27
Wodim version: 1.1.11
SCSI buffer size: 64512
Device type    : Removable CD-ROM
Version        : 5
Response Format: 2
Capabilities   :
Vendor_info    : 'Slimtype'
Identification : 'DVD A  DS8A1P   '
Revision       : 'CH71'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
Current: 0x002B (DVD+R/DL)
Profile: 0x002B (DVD+R/DL) (current)
Profile: 0x001B (DVD+R)
Profile: 0x001A (DVD+RW)
Profile: 0x0016 (DVD-R/DL layer jump recording)
Profile: 0x0015 (DVD-R/DL sequential recording)
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)
Profile: 0x0009 (CD-R)
Profile: 0x0008 (CD-ROM)
Profile: 0x0002 (Removable disk)
Using generic SCSI-3/mmc DVD-R(W) driver (mmc_mdvd).
Driver flags   : SWABAUDIO BURNFREE
Supported modes: PACKET SAO
Drive buf size : 1029888 = 1005 KB
Beginning DMA speed test. Set CDR_NODMATEST environment variable if device
communication breaks or freezes immediately after that.
FIFO size      : 16777216 = 16384 KB
Track 01: data  4671 MB
Total size:     5364 MB (531:27.82) = 2391587 sectors
Lout start:     5364 MB (531:29/62) = 2391587 sectors
Current Secsize: 2048
HINT: use dvd+rw-mediainfo from dvd+rw-tools for information extraction.
Blocks total: 4173824 Blocks current: 4173824 Blocks remaining: 1782237
Speed set to 3324 KB/s
Starting to write CD/DVD at speed   2.0 in real unknown mode for single 
session.
Last chance to quit, starting real write in    0 seconds. Operation starts.
Waiting for reader process to fill input buffer ... input buffer ready.
Errno: 5 (Input/output error), reserve track scsi sendcmd: no error
CDB:  53 00 00 00 00 00 24 7E 23 00
status: 0x2 (CHECK CONDITION)
Sense Bytes: 70 00 05 00 00 00 00 0A 00 00 00 00 27 00 00 00
Sense Key: 0x5 Illegal Request, Segment 0
Sense Code: 0x27 Qual 0x00 (write protected) Fru 0x0
Sense flags: Blk 0 (not valid)
cmd finished after 0.321s timeout 40s
wodim: Cannot open new session.
Writing  time:    0.394s
wodim: fifo had 255 puts and 0 gets.
wodim: fifo was 0 times empty and 0 times full, min fill was 100%.

I hope a wodim expert can deciper this.