Windows client backup failed with 58,40,24,13

Hi Team

Master Server: AIX, NBU Version: 7.1.0.4

Media Server: AIX, NBU Version: 7.1.0.1

Client: Windows Server 2003, NBU Version 7.1.0.1

Backup is going through Media server only.

Differential backup completed successfully but full backup from last one month is failing with differenr error codes , sometimeds it is failing with 13.. sometimes with 58.. sometimes with 24 and 40.

There are 4-6 client whose Full backups are  failing with same error codes having same versions and going through media server only.

Please let me know which logs you want so that i will attached that logs.

Thanks in Advance