Scheduled tasks do not run

I have added a task to Task Scheduler to automatically
run McAfee Virus Scan weekly. It has never worked.

I found an article (#Q308558) on Microsoft.com and tried to troubleshoot the
problem....still no luck. It appears that the task runs because there is no
error message and under the Status column, there is 0x0 which means that the
operation completed successfully....however, in viewing the Task Scheduler
log and the McAfee log, there are no entries that the event even
started....and the operation does not run as I sit and watch it!

Can anyone help me?