Vista - Not going to sleep

Hi

This has been discussed many times but my problem may be a little different

After Sp1 rc computer will not automatically sleep using power options

Choosing manual sleep works just fine so it´s not the usual problem with
wakening computers after sleep.

I have more or less changed everything but the computer wont sleep, turn off
display works fine, turn of hard drive works, but no sleep.

If i reboot and don´t log on sleep works...

I have uninstalled AVG and Wmware since that could cause problems

There is nothing an eventlog so i´m more or less stuck, what to do next? Any
more logs to check ?

I'm using vista ultimate x64 sp1 rc, asus p5k motherboard and nvidia 8600
with latest drivers.

I can send more info on request..

/Bjorn