powernow k8 problem

I have an HP zv5255us laptop with AMD64 3400+ clawhammer cpu. I have 
options for POWERNOW_K8 and POWERNOW_DEBUG in kernel. The powernow is 
not recognized upon boot up and the debug message is as follows:
k8pnow_states: before the for loop
k8pnow_states: returns 0!
k8_powernow_init: returned 0!
k8_powernow_init: k8pnow_current_state is NULL!

I am using HEAD revision from 11/19/06 listed on bootup as NetBSD 
4.99.4.  I have tried with and without ACPI and both result in same 
debug message.
Any ideas.

Thanks,

Bill