Does the XPS 720 support wake on LAN? Has anyone used this functionality?

If I put my 720 in standby, I can not get it to wake on lan activity. I have tried a couple of utilities to send magic packets, and could not get the PC to resume from standby. I can ping my 720's ip address, and the first packet times out, but the subsequent packets return replies from the ping, so it appears that the ping has brought the computer out of standby. Remote desktop connects, and allows me to enter my user name and password, but the window just closes when I click OK. I am using the same login at the console and with remote desktop, but I have no problems with the remote desktop connection if my XPS is in a fully powered state.

The worst part...
After attempting to "wake on LAN", I cannot get the PC to resume from standby, even at the console. My only option is to power down the PC by holding the power button.

System:
XPS720 black A03 BIOS
Q6600 @2.4GHz
Broadcom NetXtreme 57xx Gigabit Controller
Linksys WRT54G router

I have tried both S3 and S1 standby modes.

The NIC wakeup capabilities is set to both. Power Management is set to "allow the computer to turn off this device to save power" and "allow this device to bring the computer out of standby."

I have a home network set up with a cable internet connection and a linksys WRT54G router. My XPS is connected to the router with cat5, and I have a couple of laptops on wireless connections. I do not use DHCP for my PCs (I do have DHCP enabled on the router for my TiVo).