Backup SQL 2005 with BackupAssist - Eror Messages grr

I'm trying to backup SQL 2005 using BackupAssist.

If I try from a remote server everything seems to go fine but in the morning I find the following error in BackupAssist:

BA1503 A connection could not be made to the SQL Server instance - it could be unavailable or authentication details may have changed.


If I try with a locally installed BackupAssist then when I've searched for the SQL Servers and come to connect I get the following error:

The user is not associated with a trusted SQL Server connection. [CLIENT: <local machine>]

The only help I've found on Google for that says put it into Mixed Mode Configuration, but it already is.

You could also try posting on their forums......

BackupAssist

lol good idea!