Lite-On 20A1P won't burn

Hi everyone,
Need help…my 20A1P won’t burn anymore :frowning: This problem started a few months ago while burning SONYD21 discs with imgburn (burned fine with nero), but both programs stopped burning after a while. Now this problem has moved onto MCC004 & MKM001 disks as well, & only TYG02 burns with this drive. It seems like the drive doesn’t burn +R discs anymore. Anyone know what’s going on?
I’m using this drive in a USB enclosure. I have 2 other drives with similar enlosures (LG H22N & H42N) & they’re working fine.

Thanks for the help

Log from imgburn:

I 11:01:11 ImgBurn Version 2.3.2.0 started!
I 11:01:11 Microsoft Windows XP Professional (5.1, Build 2600 : Service Pack 2)
I 11:01:11 Total Physical Memory: 523,248 KB - Available: 309,728 KB
W 11:01:11 Drive I:\ (FAT32) does not support single files > 4 GB in size.
I 11:01:13 Initialising SPTI…
I 11:01:14 Searching for SCSI / ATAPI devices…
I 11:01:14 Found 1 DVD-ROM, 1 DVD±RW and 1 DVD±RW/RAM!
I 11:02:22 Operation Started!
I 11:02:22 Building Image Tree…
I 11:02:23 Checking Directory Depth…
I 11:02:23 Calculating Totals…
I 11:02:23 Preparing Image…
I 11:02:23 Checking Path Length…
I 11:02:23 Image Size: 4,681,531,392 bytes
I 11:02:23 Image Sectors: 2,285,904
I 11:02:24 Operation Successfully Completed! - Duration: 00:00:02
I 11:02:24 Operation Started!
I 11:02:24 Source File: -==//[BUILD IMAGE]/==-
I 11:02:24 Source File Sectors: 2,285,904 (MODE1/2048)
I 11:02:24 Source File Size: 4,681,531,392 bytes
I 11:02:24 Source File Volume Identifier: PRIMEVAL
I 11:02:24 Source File Application Identifier: IMGBURN V2.3.2.0 - THE ULTIMATE IMAGE BURNER!
I 11:02:24 Source File Implementation Identifier: ImgBurn
I 11:02:24 Source File File System(s): ISO9660, UDF (1.02)
I 11:02:24 Destination Device: [0:0:0] LITE-ON DVDRW LH-20A1P KL05 (F:) (USB)
I 11:02:24 Destination Media Type: DVD+R (Disc ID: MCC-004-00) (Speeds: 2.4x, 4x, 6x, 8x, 12x, 16x, 18x)
I 11:02:24 Destination Media Sectors: 2,295,104
I 11:02:24 Write Mode: DVD
I 11:02:24 Write Type: DAO
I 11:02:24 Write Speed: 8x
I 11:02:24 Link Size: Auto
I 11:02:24 Test Mode: No
I 11:02:24 BURN-Proof: Enabled
W 11:02:29 Device Removal Detected!
W 11:02:29 The device list will be refreshed at the next available opportunity.
I 11:02:30 Filling Buffer… (50 MB)
I 11:02:39 Writing LeadIn…
W 11:02:40 Failed to Write Sectors 0 - 31 - Access is denied.
W 11:02:40 Retrying (1 of 20)…
W 11:02:40 Retry Failed - Access is denied.
W 11:02:40 Retrying (2 of 20)…
W 11:02:40 Retry Failed - Access is denied.
W 11:02:40 Retrying (3 of 20)…
W 11:02:40 Retry Failed - Access is denied.
W 11:02:40 Retrying (4 of 20)…
W 11:02:40 Retry Failed - Access is denied.
W 11:02:40 Retrying (5 of 20)…
W 11:02:40 Retry Failed - Access is denied.
W 11:02:40 Retrying (6 of 20)…
W 11:02:40 Retry Failed - Access is denied.
W 11:02:40 Retrying (7 of 20)…
W 11:02:40 Retry Failed - Access is denied.
W 11:02:40 Retrying (8 of 20)…
W 11:02:40 Retry Failed - Access is denied.
W 11:02:40 Retrying (9 of 20)…
W 11:02:40 Retry Failed - Access is denied.
W 11:02:40 Retrying (10 of 20)…
W 11:02:40 Retry Failed - Access is denied.
W 11:02:40 Retrying (11 of 20)…
W 11:02:40 Retry Failed - Access is denied.
W 11:02:40 Retrying (12 of 20)…
W 11:02:40 Retry Failed - Access is denied.
W 11:02:40 Retrying (13 of 20)…
W 11:02:40 Retry Failed - Access is denied.
W 11:02:40 Retrying (14 of 20)…
W 11:02:40 Retry Failed - Access is denied.
W 11:02:40 Retrying (15 of 20)…
W 11:02:40 Retry Failed - Access is denied.
W 11:02:40 Retrying (16 of 20)…
W 11:02:40 Retry Failed - Access is denied.
W 11:02:40 Retrying (17 of 20)…
W 11:02:40 Retry Failed - Access is denied.
W 11:02:40 Retrying (18 of 20)…
W 11:02:40 Retry Failed - Access is denied.
W 11:02:40 Retrying (19 of 20)…
W 11:02:40 Retry Failed - Access is denied.
W 11:02:40 Retrying (20 of 20)…
W 11:02:40 Retry Failed - Access is denied.
E 11:02:58 Failed to Write Sectors 0 - 31 - Access is denied.
I 11:02:58 Synchronising Cache…
E 11:03:00 Synchronise Cache Failed! - Reason: Access is denied.
I 11:03:00 Synchronising Cache (Last Attempt!)…
E 11:03:00 Synchronise Cache Failed! - Reason: Access is denied.
I 11:03:00 Closing Track…
E 11:03:01 Close Track Failed! - Reason: Access is denied.
I 11:03:01 Closing Track (Last Attempt!)…
E 11:03:01 Close Track Failed! - Reason: Access is denied.
I 11:03:01 Finalising Disc…
E 11:03:01 Finalise Disc Failed! - Reason: Access is denied.
I 11:03:01 Finalising Disc (Last Attempt!)…
E 11:03:01 Finalise Disc Failed! - Reason: Access is denied.
E 11:03:01 Failed to Write Image!
E 11:03:02 Operation Failed! - Duration: 00:00:37
I 11:03:02 Average Write Rate: N/A - Maximum Write Rate: N/A
I 11:03:02 Searching for SCSI / ATAPI devices…
I 11:03:02 Found 1 DVD-ROM, 1 DVD±RW and 1 DVD±RW/RAM!