Question : Scheduled Backups not working

Hello ,
We have back up system running but it seem to run when it want to they are all set up the same but some days it dont work in the

name         schedule                          next run time     lastrun time     status             etc..
thursday     at 6:00am  every wen..     6:00 am 2/1/5   6:00am1/1/5
friday         at 6:00am  every thur...    6:00am3/1/5     Never             could not start

You see how friday is on this example this is what all my server look like
each server does that on different day than the other each one is different there no apart patern on a particular day it seem totally random of which day this happens on
example one server might happen on monday tuesday the other will be sun monday friday
the other just on saturday

This is what i get in the log file in the schedular tasks  

"Saturday Servername Backup.job" (ntbackup.exe) 6/9/2005 10:50:41 AM ** ERROR **
      The attempt to retrieve account information for the specified task failed; therefore, the task did not run. Either an error occurred, or no account information existed for the task.
      The specific error is:
      0x8004130f: No account information could be found in the Task Scheduler security database for the task indicated.

Now i did some research on this error and it says it patch but for 2000 and NT not 2003
here the links for those 2 but they dont help me
http://support.microsoft.com/default.aspx?scid=kb;en-us;812925  for NT
http://support.microsoft.com/default.aspx?scid=kb;en-us;328773   for 2000

The servers are all up to date with service pack
They are all 2003 servers 1 DC
They are all connected to the same LAN
Nothing indicated in my event viewers on my servers
Any ideas thxs

Answer : Scheduled Backups not working

Have you tried deleting and recreated the tasks?  ANd have you verified the user name/password being used for the task?