i found the reason for not being able to reboot was my USB hub - which led me to create two switches (just like on a desktop pc) - one switch for a soft shutdown/startup and a second for a hard shutdown/startup.
The soft switch setup you have leave as is. The second hard switch (on/off button) you connect between the pc and battery. You can place this button next to the soft switch.
Although this may not be related to you, i found after doing this that my system was still hanging. I'm leaning towards a defective hub. Since removing the hub (which is powered by a 5v cable) now my system response to a hard shutdown/startup. I will keep checking in the next few days to confirm that that was the problem. Hopefully it was.
P.S. i did the same thing for my monitor.
hope this helps.
I'm loving the motherboard. Can't wait for Win7