Hey,
WOL is working right now. With xpenology in the DSM interface there is a false MAC shown. However my Fritzbox is showing the same wrong MAC. This confused me. I startet the PC with a bootable Linux and it gave me another MAC.
I bootet with xpenology again and tried it with the MAC Linux showed me before. With this it is working.
Hope I can help some other guys with the same problem.