Sometimes addressing the WOL packet to the correct machine can be a little tricky if you're a novice to TCP/IP. So if it doesn't work when you first try it, you may want to experiment sending the WOL packet as a broadcast if your two computers are on the same IP subnet. That way, if the broadcast works, you know it's an addressing issue and not a WOL functionality issue. There's a broadcast example on Depicus' web site for the command line version of their software:
http://www.depicus.com/wake-on-lan/wake-on-lan-cmd.asp