Exchange 2010 backup fail: e000fedf - A failure occurred reading an object.

I'm using exchange 2010 and backup exec 2010.

My exchange backup gives me this error message:

Set type               : BackupSet status             : CompletedSet description        : Sun_Exchange_Full
Resource name          : \\MBSERVER.metfone.com.kh\Microsoft Information Store\metfoneLogon account          : System Logon AccountEncryption used        : None
Error                  : e000fedf - A failure occurred reading an object.

Agent used                     : YesAdvanced Open File Option used : Microsoft Volume Shadow Copy Service (VSS)

Byte count             : 687,408,224,834 bytesRate                   : 663.00 MB/Min
Files                  : 0Directories            : 0Skipped files          : 0Corrupt files          : 2Files in use           : 0
Start time             : Monday, May 06, 2013 5:14:41 PMEnd time               : Tuesday, May 07, 2013 9:43:24 AM
File is corrupt        : \\MBSERVER.metfone.com.kh\Microsoft Information Store\metfone\DatabaseFile is corrupt        : \\MBSERVER.metfone.com.kh\Microsoft Information Store\metfone\Logs ( E02005CAEC3.log - E020074CED4.log )General information    : Media Label: IMG000813; GRT backup set folder: F:\Backup Symantec\Exchange\Weekly-01-Su\IMG000813
 

Any one can help me this problem?

many thanks,

HoaPhan.