Netbackup Error 99

I am very new to this Netbackup program and I trying to figure out how to fix the Error 99 that I keep getting when trying to backup our Netapps.  The Status message is below that I get from the job when it fails each day.

7/20/2009 12:52:48 PM - requesting resource riserv01-dlt2-robot-tld-0
7/20/2009 12:52:48 PM - requesting resource riserv01.NBU_CLIENT.MAXJOBS.IP Address
7/20/2009 12:52:48 PM - requesting resource riserv01.NBU_POLICY.MAXJOBS.Host Name
7/20/2009 12:52:48 PM - granted resource riserv01.NBU_CLIENT.MAXJOBS.IP Address
7/20/2009 12:52:48 PM - granted resource riserv01.NBU_POLICY.MAXJOBS.Host Name
7/20/2009 12:52:48 PM - granted resource D00063
7/20/2009 12:52:48 PM - granted resource QUANTUM.SDLT320.001
7/20/2009 12:52:48 PM - granted resource riserv01-dlt2-robot-tld-0
7/20/2009 12:52:49 PM - started process bpbrm (4364)
7/20/2009 12:52:49 PM - connecting
7/20/2009 12:52:49 PM - connected; connect time: 00:00:00
7/20/2009 12:52:52 PM - mounting D00063
7/20/2009 12:53:54 PM - mounted; mount time: 00:01:02
7/20/2009 12:53:59 PM - positioning D00063 to file 29
7/20/2009 12:54:11 PM - positioned D00063; position time: 00:00:12
7/20/2009 12:54:11 PM - begin writing
7/20/2009 12:54:13 PM - Error ndmpagent(pid=4740) ndmp_data_start_backup failed, status = 9 (NDMP_ILLEGAL_ARGS_ERR)      
7/20/2009 12:54:13 PM - Error ndmpagent(pid=4740) NDMP backup failed, path = /vol/On_site_Employee_Data      
7/20/2009 12:54:14 PM - Error bptm(pid=5268) none of the NDMP backups for client IP Address completed successfully  
7/20/2009 12:54:30 PM - end writing; write time: 00:00:19
NDMP backup failure(99)

I am hoping to find an expert in here that can help me figure out what is going on or point me in the right direction to get these backups working again.