When deploying a package with an ftp task to my server I get the above error although it runs fine in BIDS. I am using SQL Server 2005 Standard Edition and SSIS is installed on the server (at least I think so as I can deploy and run other packages and connect to SSIS on the server using SSMS).
I'm having the same problem when I try to run the job from the server. I'm using SQL Server 2005 Team Suite.