This message pops up now when i try to do a manual backup on Sharepoint Services 3.0 Object SharePoint_Config_88b3e1df-2822-480f-a16b-05f56fb88679 failed in event OnBackup. For more information, see the error log located in the backup directory. SqlException: Access to table dbo.backupmediaset is blocked because the signature is not valid. Could not insert a backup or restore history/detail record in the msdb database. This may indicate a problem with the msdb database. The backup/restore operation was still successful. BACKUP DATABASE successfully processed 1139 pages in 1.611 seconds (5.788 MB/sec). Also is there a way to automatically run this backup instead of doing it manually? Thanks Nick