[L - Ec Uncorrectable Errorge]

I 20:20:29 Verifying Track 1 of 1... (MODE1/2048, LBA: 0 - 2265359)

W 20:25:10 Failed to Read Sectors 839744 - 839775 - Reason: L-EC Uncorrectable Error

W 20:25:17 Failed to Read Sector 839744 - Reason: L-EC Uncorrectable Error

W 20:25:17 Sector 839744 maps to File: \VIDEO_TS\VTS_01_2.VOB

E 20:30:04 Failed to Read Sector 839744 - Reason: L-EC Uncorrectable Error

E 20:30:04 Sector 839744 maps to File: \VIDEO_TS\VTS_01_2.VOB

E 20:30:04 Failed to Verify Sectors!

I 20:30:08 Exporting Graph Data...

I 20:30:08 Graph Data File: C:\Users\Shorty29\AppData\Roaming\ImgBurn\Graph Data Files\TSSTcorp_CDDVDW_TS-L633A_HH04_THURSDAY-DECEMBER-20-2012_8-09_PM_CMC_MAG._AM3_MAX.ibg

I 20:30:08 Export Successfully Completed!

E 20:30:08 Operation Failed! - Duration: 00:09:36

I 20:30:08 Average Verify Rate: 2,920 KB/s (2.1x) - Maximum Verify Rate: 7,892 KB/s (5.7x)

 

I keep getting this message I have never encounterd this before can someone please help?