After trying several of the free Wake On LAN apps unsuccessfully, I looked for the one feature that made my PC WOL program work and that was Autoscan set-up. By using the Autoscan feature, I was able to configure my Zyxel NSA320 media server effortlessly where previous attempts had failed. I highly recommend this app and its very reasonably priced.
Zonkers about WakeUp - The Wake on LAN tool