Restore Exchange 2003 individual email message in Backup Exec 2012

Hi,

I am running Symantec backup exec 2012 SP1a on windows server 2008 r2 standard, this is upgraded from previous BE 2010 R2. Now let say I want to restore an email messge in a user's inbox, but I can't see any mail message when I click on Restore, browse to user's inbox but I can't see any mail items under inbox. I don't have this problem in 2010R2.

I have applied the hotfix mentioned in the below article

http://www.symantec.com/business/support/index?page=content&id=TECH185710

I have restarted the 'backup exec server' service on media server and alao the 'backup exec remote windows agent' service on the exchange 2003 server. But still I have this problem. I notticed that since I have upgraded to BE 2012, my exchange 2003 backup job always fail with the error below:

Previously my exchagne backup job has byte count of aournd 520GB, now there is only 480GB but all the user mailbox (under Microsoft Information Store--> XX storage group) are backup up successfully.

I have tried to unchecked all options under 'Advance Open File Options" and selected all options under "Microsoft Exchange", still got same problem

What else can I do? Any advice is appreciated!