I suspect that it has something to do with your local environment and settings. Can you move the project and manually run it (from the File tab)? If I am moving a project, I usually have to change some file pointers and such; if that is not done correctly, the initial task will fail and no results; that should be in a log somewhere. If you look under scheduled tasks in the control panel, does it say it ran? I've occasionally gotten burned with Windows wanting an additional authentication (when the project was in a different active directory domain from my default login).
I just copied a project to another directory (different drive, too) and scheduled the process flow on each and they both ran fine. Ditto in scheduling the entire project.
[I am running XP SP 2, SAS 9.2 Phase 2, and EG 4.2.0.9016]