Could you check if in connection file MAC address of machine is retrieved correctly? To do it use steps below:
1. Open directory where connections are stored – it is specified in Player settings (tab Folders, field Connections and recordings).
2. Use text editor to open nxs file of connection, which you used to connect earlier with checked option “Wake up the indicated server on the LAN if powered off”.
3. Find there key “Server MAC address”.
4. If its value is empty, please try to write it manually there and save change.
Be sure that in connection edit in tab “Configuration”, option “Wake up the indicated server on the LAN if powered off” is checked. Then try by connecting if waking up will work in your case. Please write, if it helped in your case.