Master Log Backup Issue

We run a script to check the blocking issues every morning. We find a LogBack up job for master db running everyday. But the Backup team doesn't see it on their systems. The backup team says, they are not running any backup job . But this backup job shows up in the process Info. So, we manually kill it everyday. It takes a lot of wait time. We can't find where it comes from ?

Below is the info from the Process Info Page

Process ID : 86
User: ABCAdmistrator
Database: Master
Status: Runnable
Open Transactions: 0
Command: Backup Log
Application: Symantec Backup Exec for Windows
Wait Time: 42600844
WaitType: NetworkIO
CPU : 0
Physical IO: 12
memory Used: 1
Login Time: 5/19/2008 10:04:53 PM
Host: XYZ
Network Library : LPC
Network Address: 0015C58947C3
Blocked by : 0
Blocking : 0

This is the info from the Process details
BACKUP LOG [abc_xyc] TO virtual_device = 'abc_xyz_00__bfbdb0fa_9b94_4392_8ce0_0719ad2a00c5_ ' WITH NO_TRUNCATE

Master DB Properties
Size: 71MB
Space Available : 17MB
No of users: 49
Data File location: c:ProgramFilesMicrosoftSQLserverMSSQLdatamast er.mdf
Automatically grow file (enabled) 10%
Transaction Log File: c:ProgramFilesMicrosoftSQLserverMSSQLdatamast log.ldf
Automatically grow file (enabled) 10%
Reocovery Model (Master): Simple
Auto update stats, and Auto create stats enabled.


Please let me know if any one knows what the problem was??



Thanks

Rahul