Win XP Scheduled Tasks Problem

[Davidoo1]

I thought I was pretty savvy at Windows, but this one has gotten me in XP. I am trying to set up the scheduled tasks such as Cleanup, Defrag, Antivirus, etc. in the Task Scheduler. I get them set up Ok, but they won't run. When they try to run they say "the scheduled task did not run because the password was incorrect." Thing is, when I set up XP the first time I turned it on I didn't select a password. When I set up the tasks I left the password fields blank since I don't have a password. The system says I am logged on as the system administrator with no password. Do I have to give myself a password as the Admin for these scheduled tasks to run?

Thanks,