Error e00002f7 Won't Go Away

It all started with a e0001904 error on the backup of our Exchange 2010 mailbox backup job.  I restarted the Exchange 2010 server and now I'm getting a e00002f7 error.  This is what is said exactally:

V-79-57344-759 - Unable to complete the operation for the selected resource using the specified options. The following error was returned when opening the Exchange Database file: '-1003 An invalid API parameter is being used. '

I've reinstalled the remote agent on the Exchange server, and nothing changed.  I've heard many different solutions, but none of them work.

It looks like only one of the 3 mailbox databases isn't backing up.  It's our primary mailbox database, so I'm looking for a solution quickly.

Any help is appreciated.