Need to recover Libreoffice calc

Hi,

recently i have lost an important report contains very much valuable data. when i was working, the system got restarted continuously and i was unable to login properly for sometime. every time after rebooting, libra office was asking to recover my .ods file and i saved my work, it again restarted. But this time when i opens the file it shows libra office icon but not opening. How do i roll back to old form. or how do i recover the data in it?
Help me out

Hi Ambadi, please take a look to this thread.