[Write speed dropping to 0 in the middle of burning blu ray discs]

While burning, the write speed will drop to 0 and not progress for hours.

This is the first time I'm using the program, so if anyone can help that would be great.

 

I 13:28:05 ImgBurn Version 2.5.8.0 started!
I 13:28:05 Microsoft Windows 8 Core x64 Edition (6.2, Build 9200)
I 13:28:05 Total Physical Memory: 16.709.544 KiB  -  Available: 14.198.896 KiB
I 13:28:05 Initialising SPTI...
I 13:28:05 Searching for SCSI / ATAPI devices...
I 13:28:06 -> Drive 1 - Info: ATAPI iHAS124   E 4L08 (D:) (SATA)
I 13:28:06 -> Drive 2 - Info: Slimtype EB1 HLE2 (E:) (USB 2.0)
I 13:28:06 Found 1 DVD±RW/RAM and 1 BD-RE XL!
I 13:28:17 Operation Started!
I 13:28:17 Device: [0:0:0] Slimtype EB1 HLE2 (E:) (USB)
I 13:28:17 Media Type: BD-R (Disc ID: CMCMAG-BA5-000)
I 13:28:17 Media Supported Write Speeds: 2x; 4x; 6x
I 13:28:17 Quick Erase: No
I 13:28:17 Format Properly: Yes
I 13:28:17 Format Size: Preferred
I 13:28:17 Format Without Spare Areas: Yes
I 13:28:18 Erasing Disc...
I 13:28:18 If you don't want spare areas, there's no need to format this disc!
I 13:28:18 Operation Successfully Completed! - Duration: 00:00:00
I 13:29:05 Operation Started!
I 13:29:05 Device: [0:0:0] Slimtype EB1 HLE2 (E:) (USB)
I 13:29:05 Media Type: BD-R (Disc ID: CMCMAG-BA5-000)
I 13:29:05 Media Supported Write Speeds: 2x; 4x; 6x
I 13:29:05 Quick Erase: No
I 13:29:05 Format Properly: Yes
I 13:29:05 Format Size: Preferred
I 13:29:05 Format Without Spare Areas: Yes
I 13:29:05 Erasing Disc...
I 13:29:05 If you don't want spare areas, there's no need to format this disc!
I 13:29:05 Operation Successfully Completed! - Duration: 00:00:00
I 13:30:46 Operation Started!
I 13:30:46 Source File: F:\Kortfilm\Troldejaeger AS 2\Troldejaerne del 1 og 2.iso
I 13:30:46 Source File Sectors: 1.009.984 (MODE1/2048)
I 13:30:46 Source File Size: 2.068.447.232 bytes
I 13:30:46 Source File Volume Identifier: AVCHD
I 13:30:46 Source File Volume Set Identifier: 52C9AC71000F6882
I 13:30:46 Source File Application Identifier: ImgBurn v2.5.8.0
I 13:30:46 Source File Implementation Identifier: ImgBurn
I 13:30:46 Source File File System(s): UDF (2.50)
I 13:30:46 Destination Device: [0:0:0] Slimtype EB1 HLE2 (E:) (USB)
I 13:30:46 Destination Media Type: BD-R (Disc ID: CMCMAG-BA5-000)
I 13:30:46 Destination Media Supported Write Speeds: 2x; 4x; 6x
I 13:30:46 Destination Media Sectors: 12.219.392
I 13:30:46 Write Mode: BD
I 13:30:46 Write Type: DAO
I 13:30:46 Write Speed: 6x
I 13:30:46 Hardware Defect Management Active: No
I 13:30:46 BD-R Verify Not Required: Yes
I 13:30:46 Link Size: Auto
I 13:30:46 Lock Volume: Yes
I 13:30:46 Test Mode: No
I 13:30:46 OPC: No
I 13:30:46 BURN-Proof: Enabled
I 13:30:46 Write Speed Successfully Set! - Effective: 26.970 KB/s (6x)
I 13:30:50 Filling Buffer... (80 MiB)
I 13:30:52 Writing LeadIn...
I 13:31:17 Writing Session 1 of 1... (1 Track, LBA: 0 - 1009983)
I 13:31:17 Writing Track 1 of 1... (MODE1/2048, LBA: 0 - 1009983)