Power OFF button on very old motherboard with FreeBSD 7.2

[newuse at qip.ru]

Hellow, I have not found my trouble in Current problem reports assigned to freebsd-acpi list, why?

I'll   try to describe my trouble again:

I have tried to find an answer on different forums but did not succeed, I am using FreeBSD 7 on very old PC but with ATX PSU, but ATX power button does not work correctly :( It terminates power after pressing for 5 seconds whithout system shutdowning or does nothing after short press.

I have the same problems on two different motherboards:
Asus TX-97E 
and
ZIDA BXi98-ATX (CreateBXi-ATX) rev. 1.0


There is only this errors in DMESG:


ACPI Error (tbxfroot-0308): A valid RSDP was not found [20070320]

ACPI: Table initialisation failed: AE_NOT_FOUND

ACPI: Try disabling either ACPI or apic support.


Of course there is no apic and it is disabled.

I also have found reports of correctly works on FreeBSD 4 with Asus TX-97E  MB.

Guru, could you help me? Please!