BExec 2014 Exchange 2010 Duplicate failure

Hi

Since the beginning of the week our exchange backups have been failing.

We are running Bexec 2014 (up to date) and exchange 2010 CU3 + hotfixes. However since Monday the duplicate job has begun to fail with the error:

Cannot extract mailbox messages from the Exchange backup. Review job log for more information.

In the job log i get:

V-79-57344-759 - Unable to complete the operation. The following error was returned when accessing the Exchange Database file: '-1018 There is a checksum error on a database page

The original backup to disk works perfectly with no errors, it is only the duplicate job that fails.

Any advice to fix this,

thanks

Olly