Scheduling problem

Hey guys, when I try to run a scheduled task under xp of copying a snapshot to an archive, firstdefense gives the error "missing command" and fails. If I update manually it works fine, as does it when running scheduled tasks from my windows server 2003 snapshot.

I need my scheduling to function- otherwise i'd spend most of my time administrating my computer, rather than actualy using it, can anyone advise possible causes?

thanks in advance