We have just installed SQL server 2008 standard as and upgrade to 2005 on an SBS 2003 server.
I can set up the maintenance plans ok for backups etc but when I execute the plans they fail at step 1. I have set up reporting for the plan but no file gets written, and nothing appears in either the maintenance plan history or job history.
Interestingly, I scripted out the plan and ran it as a query and it worked fine.
I have tried this with SQL agent running as local system account, or the domain administrator that I ran the scripting fine with.