Hi Kalyana,
Since you could see the backup history from the year 2009 , I assume you have a very long backup history log as of today. Due to such long history file system may not show you all the history details or may not show you latest log details as well. You need to shorten the size of this backup history log file to view the latest backup details.
How to achieve this: refer link http://wiki.sdn.sap.com/wiki/display/MaxDB/How+To+-+Shorten+the+backup+history+for+MaxDB+instances
Hope this helps.
Regards,
Deepak Kori