Problem in Restoring Data file

When i m trying to restore(using restoredata.bat) data base from a file created by the backup program. The restoredata program struck here after throughing this exception.
Any help to sort this issue would be really appreciated.
Regards
Farooq

********************************************************************************
*
Restore DB Setup Wizard
********************************************************************************
*

Execute Restore DB Utility from command prompt

For Windows users :
bin>restoreData -c [backup file]

For Linux users :
bin]#sh restoreData.sh -c [backup file]

********************************************************************************
*
You chose to open this file: C:\AdventNet\ME\SupportCenter\backup\Backup_scp_650
0_03_03_2008_13_03.data
File name is : C:\AdventNet\ME\SupportCenter\backup\Backup_scp_6500_03_03_2008_
13_03.data
requestScheme is https
stopping DB Server >>>>> false
Exception in thread "Thread-3" java.lang.NoClassDefFoundError: org/apache/common
s/logging/LogFactory
at org.apache.commons.httpclient.HttpClient.<clinit>(HttpClient.java:65)

at com.adventnet.servicedesk.server.utils.SDClientUtil.isServerAlreadyRu
nning(SDClientUtil.java:164)
at com.adventnet.servicedesk.tools.RestoreSDBackup.restoreDatabase(Resto
reSDBackup.java:99)
at com.adventnet.servicedesk.tools.RestoreSDBackup.main(RestoreSDBackup.
java:81)
at com.adventnet.servicedesk.tools.RestoreDialog$5.run(RestoreDialog.jav
a:184)
at java.lang.Thread.run(Unknown Source)