Using the SQL Server Agent for the first time

I have set up several jobs to run automatically throughout the day. Each job just does one thing: executes an SSIS package.

The packages themselves run perfect when I test them in Visual Studio 2005, but when the SQL Server Agent tries to run the job I am getting failed jobs.

Is there any tutorials or walkthroughs that can teach my about using the SQL Server Agent? If I wanted extensive help troubleshooting my SQL Server Agent problems which part of the message boards would I post that too?

Thanks for the info!