When you restore an entire database, you replace a database file that is damaged, has data problems, or is missing altogether, with a backup of the entire database.

If the database file is missing, copy the backup to the location where the database should be.

IMPORTANT If other databases or programs have links to objects in the database that you are restoring, it is critical that you restore the database to the correct location. If you do not, links to the database objects will not work and will have to be re-created, such as by using the Linked Table Manager.

If the database file is damaged or has data problems, delete the damaged file and then replace the damaged file with the backup.

Or try:

eRepair Access is a powerful Access database recovery solution for damaged *.mdb and *.accdb files created in Access 2000 and above.

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And the similar question was discussed here: http://www.filerepairforum.com/forum/microsoft/microsoft-aa/access/314-ms-access-mdb-ldb-database-corrupted