Checkout these references would be help you:
http://msdn.microsoft.com/en-us/library/ms177429.aspx
http://www.howtogeek.com/50354/restoring-a-sql-database-backup-using-sql-server-management-studio/
If the above solution did not work try this free trial version of SQL Database recovery Software.
http://www.repairsqlserver.net
Thanks