Please try without truncating the log before the full backup

To move DTS packages I use

INSERT INTO msdb.dbo.sysdtspackages

SELECT * FROM

OPENDATASOURCE('SQLOLEDB', 'Data Source=SQL-Server;User ID=sa;Password=pwd').msdb.dbo.sysdtspackages

It works fine from SQLAgent and keeps all servers synchronized.

You might want to delete existing packages...