Wake Server when I wake my Living room HTPC

I'm trying to find a way to wake my Server when I wake up my livingroom htpc. I have tried several commandlines in the task scheduler but so far nothing that works.

My server is going into sleep mode when there is no use for it but all my stuff is on that pc so when I wake my other pc I need to wake the server first. I do have a tool inside MC that give me the option to wake other pc’s over the network but I would like it be done automaticly when I wake that pc.

What is the best way (if possible) to do that?