How to use Wake on Demand?

Hello,

I am trying to use the wake on demand feature to ssh from one mac to another while the targeted one is sleeping. According to this official page http://support.apple.com/kb/HT3774 , i can do this even if i do not own a time capsule or a apple router, but alone with the apple tv. I have an iMac with 10.8.3 a macbook pro late 2012 with 10.8.3 and the last generation of apple tv, all connected to my wireless network that uses a generic modem/ router. I have wake on demand ON on both machines and i am trying to acces the macbook while it is sleeping by using 'connect to server: macbook_ip_address', which normally works if the macbook is not sleeping.

According to the link mentioned above, with my setup and without any other setting it should work. Any ideas?

Thanks!