SDP 8108 Backup Error

Dear Sir,

I have problem with backup database, it error is:

Pls help me to fix it,

Thank you very much!

C:\ManageEngine\ServiceDesk\bin>backUpData.bat
Starting....
Aug 7, 2012 1:59:42 PM com.adventnet.servicedesk.server.utils.SDDataManager setStandAlone
INFO: Going to set the standAlone param as : true
Aug 7, 2012 1:59:42 PM com.adventnet.servicedesk.server.utils.SDDataManager setStandAlone
INFO: Going to reset rootDir using server.dir
Aug 7, 2012 1:59:42 PM com.adventnet.servicedesk.server.utils.SDDataManager <init>
INFO: rootDir :: ..
Aug 7, 2012 1:59:42 PM com.adventnet.servicedesk.server.utils.SDDataManager <init>
INFO: netutilsData :: {RELEASE={version=8.1.0}, BUILD={number=8108}}
Aug 7, 2012 1:59:42 PM com.adventnet.servicedesk.server.utils.SDDataManager <init>
INFO: rebrandData :: {OPMANAGER={name=OpManager}, PRODUCT={name=ManageEngine ServiceDesk P
lus}, ADMANAGER={name=ADManager}}
Active DB Server = mysql
Database connectionProp : useUnicode=true
characterEncoding=UTF-8

Database started
*************************************************************
Number of tables found : 1175
-------------------------------------------------------------
Build number : 8108
-------------------------------------------------------------
backup_info.xml : true
-------------------------------------------------------------
Ignored Table List
-------------------------------------------------------------
AaaAccSessionAudit
AaaAccHttpSession
AaaAccSessionProp
AaaAccSession
AuditRecord
OperationAuditRecord
AuditResultProperty
AuditResourceProp
AuditOperProperty
RecentItems
-------------------------------------------------------------
Going to take full backup with file attachments
-------------------------------------------------------------
deleting duplicate entries in WordMap table : 0
*************************************************************

Please wait ! backup in Progress...................
0-----------------------50------------------------100(%)
========ERROR = *Base table or view not found, message from server: "Table 'servicedesk.a
rc_servicereq_1801' doesn't exist"* Query = SELECT max(WORKORDERID) FROM ARC_ServiceReq_18
01
ERROR = *Base table or view not found, message from server: "Table 'servicedesk.arc_servi
cereq_1801' doesn't exist"*
java.lang.Exception: Unable to get the data from [ARC_ServiceReq_1801] table
        at com.adventnet.servicedesk.tools.SDBackUp.dumpTableUsingLimit(SDBackUp.java:1101
)
        at com.adventnet.servicedesk.tools.SDBackUp.dumpTableUsingLimit(SDBackUp.java:1120
)
        at com.adventnet.servicedesk.tools.SDBackUp.dumpTableUsingCriteria(SDBackUp.java:8
08)
        at com.adventnet.servicedesk.tools.SDBackUp.dumpTable(SDBackUp.java:781)
        at com.adventnet.servicedesk.tools.SDBackUp.startBackup(SDBackUp.java:353)
        at com.adventnet.servicedesk.tools.SDBackUp.process(SDBackUp.java:95)
        at com.adventnet.servicedesk.tools.SDBackUp.main(SDBackUp.java:1813)

stopping DB Server >>>>> false
java.lang.Exception: Unable to get the data from [ARC_ServiceReq_1801] table
        at com.adventnet.servicedesk.tools.SDBackUp.dumpTableUsingLimit(SDBackUp.java:1101
)
        at com.adventnet.servicedesk.tools.SDBackUp.dumpTableUsingLimit(SDBackUp.java:1120
)
        at com.adventnet.servicedesk.tools.SDBackUp.dumpTableUsingCriteria(SDBackUp.java:8
08)
        at com.adventnet.servicedesk.tools.SDBackUp.dumpTable(SDBackUp.java:781)
        at com.adventnet.servicedesk.tools.SDBackUp.startBackup(SDBackUp.java:353)
        at com.adventnet.servicedesk.tools.SDBackUp.process(SDBackUp.java:95)
        at com.adventnet.servicedesk.tools.SDBackUp.main(SDBackUp.java:1813)
C:\ManageEngine\ServiceDesk\bin>