Backup in 4.1 sp12 Failing

I'm trying to upgrade to version 5, and want to make sure i've got a full backup before beginning the process. the backup process creates a file but comes up with the error displays as follows...
Any ideas?

... startTime 1135861880559
rootdir ..
Directory where the backed up information will be placed is : ..\backup

Please wait ! Backup in Progress..................... |destinationDir : .
p:: backupFileName :BackUp_DEC29_2005_13_11
backup directory : ..\backup
-Database username : root
Database password : null
Database driver : org.gjt.mm.mysql.Driver
Database connectionURL : jdbc:mysql://localhost:33366/servicedesk
\Database from which data is going to be backed up is : servicedesk
getAllTableNames 517
Dec 29, 2005 1:11:25 PM com.adventnet.servicedesk.server.utils.SDDataMana
it>
INFO: rootDir :: ..
|Dec 29, 2005 1:11:25 PM com.adventnet.servicedesk.server.utils.SDDataMan
nit>
INFO: netutilsData :: {RELEASE={version=4.1.0}, BUILD={number=4112}}
Dec 29, 2005 1:11:25 PM com.adventnet.servicedesk.server.utils.SDDataMana
it>
INFO: rebrandData :: {OPMANAGER={name=OpManager}, PRODUCT={name=AdventNet
Engine ServiceDesk Plus}}
-Exception in thread "main" java.lang.OutOfMemoryError: Java heap space