make sure you are logged in as an administrator when installing. 

Scott...I agree.  I have a single maintenance plan for my production databases and I have not had a situation where the failure of a db backup caused the entire maintenance...

**Update on my problem with trans log backup**

I found that I was getting errors when trying to backup trans logs and tempdb full errors.  I created a db maint plan...

I am running sql 2000 on windows 2003 clustered servers and have recently started having the same problem.  The log backup has been running fine for over a year...