I've still been searching for a good way to schedule/automate downloads of web sites since Windows 2000 has a scheduler bug (at least this SP did that I have at work). I finally resorted to a script based schedule wizard that I place in my startup group. It's very configurable, but takes some scripting to get it up an running with Isilox. If you can't get scheduler to work and decide to give it a try, find it here:
http://www.authord.com/
Good luck,
Madman_X