apm support

[ray]

hi, i have a Sony Vaio PCG-GRZ660 laptop and i'm trying to get apm to work. i have the apmd running. apm displays this:

~# apm
APM version: 1.2
APM Management: Disabled
AC Line status: on-line
Battery status: unknown
Remaining battery life: unknown
Remaining battery time: unknown
Number of batteries: 0
Resume timer: disabled
Resume on ring indicator: disabled
APM Capacities:
        global standby state
        global suspend state
        resume timer from standby
        resume timer from suspend

if i try to go in standby mode, it says:
~# apm -Z
apm: ioctl(APMIO_STANDBY): Invalid argument

how can i get it to go to standby mode, and also how can i get it to display battery status and show if the ac adapter is plugged in or not?