Como gravar DVDs no Ubuntu 7.04

[Zericardo]

Tenho instalado o Ubuntu 7.04 em dual-boot com Win Xp e tudo funciona muito bem,mas não consigo gravar DVDs de maneira nenhuma,vamos aos probls; Tenho instalado os programs K3B,Brasero e Gnome Baker,tenho instalado aqui o Gnome eo KDE e não consigo usando nenhum programa sempre da erro,minhas configs .Pentium 4 1,80 ghz ,512 MB de memotia ,2 Gravadores de DVDS,placa mãe GiGabyte,2 Hds sendo 1-40 Gb sendo 20Gb WinXP + Ubuntu 7.04 Feisty e um com 20 GB Instalado Win XP,tentei gravar nmo K3B e le deu uma mensagem de erro que eu vou colar abaixo:
System
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K3b Version: 1.0

KDE Version: 3.5.6
QT Version:  3.3.7
Kernel:      2.6.20-17-generic
Devices
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HL-DT-ST DVDRAM GSA-4167B DL12 (/dev/hdd, ) [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 Seqüencial, DVD-R de Dupla Camada Seqüencial, DVD-R de Dupla Camada com Salto, DVD-RAM, DVD-RW em Sobrescrita Restrita, DVD-RW Seqüencial, DVD+RW, DVD+R, DVD+R de Dupla Camada, CD-ROM, CD-R, CD-RW] [SAO, TAO, RAW, SAO/R96P, SAO/R96R, RAW/R16, RAW/R96P, RAW/R96R, Sobrescrita Restrita]

HL-DT-ST DVDRAM GSA-H42N RL00 (/dev/hdc, ) [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 Seqüencial, DVD-R de Dupla Camada Seqüencial, DVD-R de Dupla Camada com Salto, DVD-RAM, DVD-RW em Sobrescrita Restrita, DVD-RW Seqüencial, DVD+RW, DVD+R, DVD+R de Dupla Camada, CD-ROM, CD-R, CD-RW] [SAO, TAO, RAW, SAO/R96P, SAO/R96R, RAW/R16, RAW/R96P, RAW/R96R, Sobrescrita Restrita, Salto da Camada]
K3bDataTrackReader
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reading sectors 0 to 2286111 with sector size 2048. Length: 2286112 sectors, 4681957376 bytes.
using buffer size of 64 blocks.
Problem while reading. Retrying from sector 1168896.
Problem while reading. Retrying from sector 1169280.
Problem while reading. Retrying from sector 1169536.
Problem while reading. Retrying from sector 1170048.
Problem while reading. Retrying from sector 1171456.
Problem while reading. Retrying from sector 1171968.
Problem while reading. Retrying from sector 1172224.
Problem while reading. Retrying from sector 1278592.
Problem while reading. Retrying from sector 1281344.
Problem while reading. Retrying from sector 1281664.
Problem while reading. Retrying from sector 1282048.
Problem while reading. Retrying from sector 1282240.
Problem while reading. Retrying from sector 1282560.
Problem while reading. Retrying from sector 1283072.
Problem while reading. Retrying from sector 1283200.
Problem while reading. Retrying from sector 1283328.
Problem while reading. Retrying from sector 1283968.
Problem while reading. Retrying from sector 1284096.
Problem while reading. Retrying from sector 1285504.
Problem while reading. Retrying from sector 1286272.
Problem while reading. Retrying from sector 1286592.
Problem while reading. Retrying from sector 1286720.
Problem while reading. Retrying from sector 1286784.
Problem while reading. Retrying from sector 1287232.
Problem while reading. Retrying from sector 1288000.
Problem while reading. Retrying from sector 1288128.
Problem while reading. Retrying from sector 1288448.
Problem while reading. Retrying from sector 1296640.
Problem while reading. Retrying from sector 1298624.
Problem while reading. Retrying from sector 1299584.
Problem while reading. Retrying from sector 1300480.
Problem while reading. Retrying from sector 1301440.
Problem while reading. Retrying from sector 1485504.
Problem while reading. Retrying from sector 1486592.
Problem while reading. Retrying from sector 1493696.
Problem while reading. Retrying from sector 2228032.
Read error in sector 2228032.
Read a total of 2228032 sectors (4563009536 bytes)
Por favor gostaria de saber onde estou errando se é na instalação de drivers ou o que é pois tenho instaldo todos os Codecs de video do Ubuntu

[clcampos]

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