how do i fix LeadIn error ? this is the log that pops up every tim
I 16:53:06 ImgBurn Version 2.5.7.0 started!
I 16:53:06 Microsoft Windows 7 Ultimate x64 Edition (6.1, Build 7600)
I 16:53:06 Total Physical Memory: 1,833,392 KB - Available: 771,644 KB
I 16:53:06 Initialising SPTI...
I 16:53:06 Searching for SCSI / ATAPI devices...
I 16:53:07 -> Drive 1 - Info: HL-DT-ST DVDRAM GSA-T50N RR09 (D (ATA)
I 16:53:07 Found 1 DVDRW/RAM!
I 16:54:26 Operation Started!
I 16:54:26 Source File: C:\Users\Devin\Desktop\ISO Programs\Physics n Flex v3\Physics n Flex v3.dvd
I 16:54:26 Source File Sectors: 3,825,924 (MODE1/2048)
I 16:54:26 Source File Size: 7,835,492,352 bytes
I 16:54:26 Source File Volume Identifier: XGD2DVD_NTSC
I 16:54:26 Source File Volume Set Identifier: 34672923
I 16:54:26 Source File Implementation Identifier: Sonic Scenarist 3.1
I 16:54:26 Source File File System(s): ISO9660, UDF (1.02)
I 16:54:26 Destination Device: [1:0:0] HL-DT-ST DVDRAM GSA-T50N RR09 (D (ATA)
I 16:54:26 Destination Media Type: DVD+R DL (Disc ID: RITEK-S04-66)
I 16:54:26 Destination Media Supported Write Speeds: 2.4x, 4x, 6x
I 16:54:26 Destination Media Sectors: 4,173,824
I 16:54:26 Write Mode: DVD
I 16:54:26 Write Type: DAO
I 16:54:26 Write Speed: 2.4x
I 16:54:26 DVD+R DL Reserve Track: No
I 16:54:26 Link Size: Auto
I 16:54:26 Lock Volume: Yes
I 16:54:26 Test Mode: No
I 16:54:26 OPC: No
I 16:54:26 BURN-Proof: Enabled
I 16:54:26 Write Speed Successfully Set! - Effective: 3,324 KB/s (2.4x)
I 16:54:26 Book Type Setting: N/A (Reason: Invalid Command Operation Code)
I 16:54:26 User Specified L0 Data Zone Capacity: 1,913,760
W 16:54:48 Set L0 Data Zone Capacity Failed! - Reason: Write Error
E 16:54:51 Set L0 Data Zone Capacity Failed! - Reason: Write Error
E 16:54:51 Operation Failed! - Duration: 00:00:25
I 16:54:51 Average Write Rate: N/A - Maximum Write Rate: N/A
I 16:56:21 Operation Started!
I 16:56:21 Source File: C:\Users\Devin\Desktop\ISO Programs\Physics n Flex v3\Physics n Flex v3.dvd
I 16:56:21 Source File Sectors: 3,825,924 (MODE1/2048)
I 16:56:21 Source File Size: 7,835,492,352 bytes
I 16:56:21 Source File Volume Identifier: XGD2DVD_NTSC
I 16:56:21 Source File Volume Set Identifier: 34672923
I 16:56:21 Source File Implementation Identifier: Sonic Scenarist 3.1
I 16:56:21 Source File File System(s): ISO9660, UDF (1.02)
I 16:56:21 Destination Device: [1:0:0] HL-DT-ST DVDRAM GSA-T50N RR09 (D (ATA)
I 16:56:21 Destination Media Type: DVD+R DL (Disc ID: RITEK-S04-66)
I 16:56:21 Destination Media Supported Write Speeds: 2.4x, 4x, 6x
I 16:56:21 Destination Media Sectors: 3,827,520
I 16:56:21 Write Mode: DVD
I 16:56:21 Write Type: DAO
I 16:56:21 Write Speed: 2.4x
I 16:56:21 DVD+R DL Reserve Track: No
I 16:56:21 Link Size: Auto
I 16:56:21 Lock Volume: Yes
I 16:56:21 Test Mode: No
I 16:56:21 OPC: No
I 16:56:21 BURN-Proof: Enabled
I 16:56:21 Write Speed Successfully Set! - Effective: 3,324 KB/s (2.4x)
I 16:56:21 Book Type Setting: N/A (Reason: Invalid Command Operation Code)
I 16:56:21 Optimal L0 Data Zone Capacity: 1,913,760
I 16:56:21 Optimal L0 Data Zone Method: Copied From Original Disc
I 16:56:21 Set L0 Data Zone Capacity Succeeded!
I 16:56:22 Filling Buffer... (40 MB)
I 16:56:23 Writing LeadIn...
W 16:58:13 Failed to Write Sectors 544 - 575 - Reason: Focus Servo Error
W 16:58:13 Retrying (1 of 20)...
W 16:58:13 Retry Failed - Reason: Focus Servo Error
W 16:58:13 Retrying (2 of 20)...
W 16:58:13 Retry Failed - Reason: Invalid Address For Write
W 16:58:13 Retrying (3 of 20)...
W 16:58:13 Retry Failed - Reason: Invalid Address For Write
W 16:58:13 Retrying (4 of 20)...
W 16:58:13 Retry Failed - Reason: Invalid Address For Write
W 16:58:13 Retrying (5 of 20)...
W 16:58:13 Retry Failed - Reason: Invalid Address For Write
W 16:58:13 Retrying (6 of 20)...
W 16:58:13 Retry Failed - Reason: Invalid Address For Write
W 16:58:13 Retrying (7 of 20)...
W 16:58:13 Retry Failed - Reason: Invalid Address For Write
W 16:58:13 Retrying (8 of 20)...
W 16:58:13 Retry Failed - Reason: Invalid Address For Write
W 16:58:13 Retrying (9 of 20)...
W 16:58:13 Retry Failed - Reason: Invalid Address For Write
W 16:58:13 Retrying (10 of 20)...
W 16:58:13 Retry Failed - Reason: Invalid Address For Write
W 16:58:13 Retrying (11 of 20)...
W 16:58:13 Retry Failed - Reason: Invalid Address For Write
W 16:58:13 Retrying (12 of 20)...
W 16:58:13 Retry Failed - Reason: Invalid Address For Write
W 16:58:13 Retrying (13 of 20)...
W 16:58:13 Retry Failed - Reason: Invalid Address For Write
W 16:58:13 Retrying (14 of 20)...
W 16:58:13 Retry Failed - Reason: Invalid Address For Write
W 16:58:13 Retrying (15 of 20)...
W 16:58:13 Retry Failed - Reason: Invalid Address For Write
W 16:58:13 Retrying (16 of 20)...
W 16:58:14 Retry Failed - Reason: Invalid Address For Write
W 16:58:14 Retrying (17 of 20)...
W 16:58:14 Retry Failed - Reason: Invalid Address For Write
W 16:58:14 Retrying (18 of 20)...
W 16:58:14 Retry Failed - Reason: Invalid Address For Write
W 16:58:14 Retrying (19 of 20)...
W 16:58:14 Retry Failed - Reason: Invalid Address For Write
W 16:58:14 Retrying (20 of 20)...
W 16:58:14 Retry Failed - Reason: Invalid Address For Write
E 16:58:16 Failed to Write Sectors 544 - 575 - Reason: Focus Servo Error
E 16:58:16 Next Writable Address: 0
I 16:58:16 Synchronising Cache...
W 16:58:19 User opted to skip the 'Close Track/Session/Disc' functions.
E 16:58:19 Failed to Write Image!
E 16:58:19 Operation Failed! - Duration: 00:01:58
I 16:58:19 Average Write Rate: 0 KB/s (0.0x) - Maximum Write Rate: 0 KB/s (0.0x)

please comment how to fix that i will pay you 5$ !!!