I am having an issue backing up SQL Server databases with version 6.5 for Small Business Server. The backup will run fine for several days, then unexpectedly the backup of SQL Server fails stating it cannot access the database (error -1221). I try to edit the script and access the database, but when it prompts me for user id and password for Windows authentication, it still cannot access the database. User id and password are valid, I can access the database outside Retrospect. Only solution is to reboot the server. This solves the problem temporarily, but after several days I get the same error.