Wake on LAN

[Chris Zakelj]

Having a bit of a problem here that I hope someone may be able to shed
some light on.  I've got a system I'm turning into a DVR, and when the
system's already on, it works perfectly.  However, in an effort to save
a bit of electricity (along with wear and tear on the hard drives), I'd
like to turn the thing off at night, and have my webserver send a WOL
magic packet to wake it up roughly 10 minutes before the first show of
the afternoon starts.  I've installed wol-0.7.1p1 from packages, and it
*sometimes* works.  I say sometimes because it does exactly that...
whether I turn the computer off using the power button on the keyboard,
or the shutdown/hibernate modes of Windows XP SP2, there's about a 50/50
chance it'll wake up when the packet gets sent from command line using:

#/usr/local/bin/wol -i 192.168.0.5 00:0a:5e:2c:e1:5d

When running from a crontab, it has never worked.  Where should I look
for the problem?