Backing up multiple SIDs

Hi,

On R/3 4.7, DB13, scheduling a Full back-up shows a list of all the user databases in the SQL server instance and you can do a full back-up of all of them from one SAP system.

In mySAP ERP 2005 DB13 I cannot see all the user databases, only check-boxes for 'master', 'msdb' and 'SID (SAP DB)'. So I can only back-up a single database. How do I create a full back-up for e.g. DEV and QAS, from DB13 in the DEV system?

Thanks,

Richard