Vista - Reliability Monitor

I'm still struggling to get my reliabilty monitor going. RACAgent fails with
the following error: The parameter is incorrect. (0x80070057). I disabled
all the performance counters in
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services and it still fails.

I noticed something new, When my system has booted up and done it's disk
grinding, RACAgent runs fine when I run it from the Task Scheduler. When
Task Scheduler itself runs it for the first time on it own (15 mins after
boot) it fails, really weird!

Any thoughts on this would be greatly appreciated.