Disc non Empty and burning problem

[Hiten]

I have tryed to write files to disc but before I have received the message "Disc not empty", then after insert disc a second time, the burning is failed. What's the problem? (Sorry for my english).

 

Device window:

 

MATSHITA DVD-RAM UJ-85JS F100 (ATA)

Current Profile: DVD-R

 

Disc Information:

Status: Incomplete

Erasable: No

Sessions: 1

Free Sectors: 1.972.096

Free Space: 4.038.852.608 bytes

Free Time: 438:16:46 (MM:SS:FF)

Supported Write Speeds: 1x; 2x; 4x; 8x

 

Pre-recorded Information:

Manufacturer ID: MCC 03RG20

 

Physical Format Information (Last Recorded):

Disc ID: 0@P-!-00

Book Type: DVD-R

Part Version: 5

Disc Size: 120mm

Maximum Read Rate: Not Specified

Number of Layers: 1

Track Path: Parallel Track Path (PTP)

Linear Density: 0.267 um/bit

Track Density: 0.74 um/track

First Physical Sector of Data Area: 196.608

Last Physical Sector of Data Area: 2.168.703

Last Physical Sector in Layer 0: 0

 

LOG:

 

I 17:10:20 ImgBurn Version 2.4.2.0 started!

I 17:10:20 Microsoft Windows Vista Home Premium Edition (6.0, Build 6000)

I 17:10:20 Total Physical Memory: 1.039.296 KB - Available: 373.808 KB

I 17:10:20 Initialising SPTI...

I 17:10:20 Searching for SCSI / ATAPI devices...

I 17:10:20 Found 1 DVD