batch file scheduling

I have a simple batch to xcopy My Documents and Favorites to my slave hard drive.
XCOPY "C:\Documents and Settings\jo\My Documents" F:\BAK /S/D/Y
XCOPY "C:\Documents and Settings\jo\Favorites" F:\BAK\FAV /S/D/Y
I'm trying to use task scheduler w2k to run this at start up but it won't start. It runs fine when I manually click on it. It's named BAK.BAT. like usual every little thing I try to do on the PC is a major problem. How do I get it to start in TS W2K--JB