cynthia - thx for the reply. i did try now again with the latest version of imgburn and i am having the same issue. i find it strange that imgburn can recognize and read the disc while burning but later while verifying it cannot!!
I 21:34:13 ImgBurn Version 2.5.0.0 started!
I 21:34:13 Microsoft Windows Vista Home Premium Edition (6.0, Build 6002 : Service Pack 2)
I 21:34:13 Total Physical Memory: 1,047,296 KB - Available: 395,868 KB
W 21:34:13 SPTD can have a detrimental effect on drive performance.
I 21:34:13 Initialising SPTI...
I 21:34:13 Searching for SCSI / ATAPI devices...
I 21:34:14 Found 1 DVD-R and 1 BD-ROM/HD DVD-ROM!
I 21:40:06 Operation Started!
I 21:40:06 Source File: H:\ISOs\Image.iso
I 21:40:06 Source File Sectors: 2,294,912 (MODE1/2048)
I 21:40:06 Source File Size: 4,699,979,776 bytes
I 21:40:06 Source File Volume Identifier: SPORTS IMAGE
I 21:40:06 Source File File System(s): Special
I 21:40:07 Destination Device: [1:0:0] SONY DVD+-RW DW-Q58A UDS1 (E:) (ATA)
I 21:40:07 Destination Media Type: DVD-R (Disc ID: MCC 03RG20) (Speeds: 2x, 4x, 6x, 8x)
I 21:40:07 Destination Media Sectors: 2,297,888
I 21:40:07 Write Mode: DVD
I 21:40:07 Write Type: DAO
I 21:40:07 Write Speed: 2x
I 21:40:07 Link Size: Auto
I 21:40:07 Lock Volume: Yes
I 21:40:07 Test Mode: No
I 21:40:07 OPC: No
I 21:40:07 BURN-Proof: Enabled
I 21:40:08 Filling Buffer... (40 MB)
I 21:40:10 Writing LeadIn...
I 21:41:02 Writing Session 1 of 1... (1 Track, LBA: 0 - 2294911)
I 21:41:02 Writing Track 1 of 1... (MODE1/2048, LBA: 0 - 2294911)
I 22:08:57 Synchronising Cache...
I 22:11:04 Exporting Graph Data...
I 22:11:04 Graph Data File: C:\Users\srch\AppData\Roaming\ImgBurn\Graph Data Files\SONY_DVD+-RW_DW-Q58A_UDS1_TUESDAY-JULY-28-2009_9-40_PM_MCC_03RG20_2x.ibg
I 22:11:04 Export Successfully Completed!
I 22:11:04 Operation Successfully Completed! - Duration: 00:30:57
I 22:11:04 Average Write Rate: 2,741 KB/s (2.0x) - Maximum Write Rate: 2,884 KB/s (2.1x)
I 22:11:04 Cycling Tray before Verify...
W 22:11:18 Waiting for device to become ready...
I 22:14:01 Abort Request Acknowledged
E 22:14:01 Device Not Ready - Reason: Medium Not Present
E 22:14:01 Operation Aborted!
I 22:14:25 Close Request Acknowledged
I 22:14:25 Closing Down...
I 22:14:26 Shutting down SPTI...
I 22:14:26 ImgBurn closed!
not comfortable flashing the firmware for my drive since saw few users flashing the firmware for this drive and having issues later