App sweep not working?

I have App Sweep enabled in 3.3.2 (1215) but it does't seem to be sweeping apps that I drop into the trash. I dropped some apps into the trash last night on purpose, and left things alone for 30 minutes. No popup from Hazel. Move the apps back to /Applications and use MAcBooster 2 "Uninstall" and it picked up several support files for each application I wanted to uninstall.
Any idea what's happening and how I can fix it?
Any idea what's happening and how I can fix it?