Aurora R15, can't wake up with remote NoMachine software

I'm trying to connect R15 remotely using NoMachine software. But it can't connect when it's in sleep mode. But Windows Remote Desktop can in the same sleep mode. The NoMachine software with same configuration can connect other desktop in sleep mode.

Case1: PC1 can connect my R15 using Remote Desktop in sleep mode

Case2: PC1 can't connect my R15 using NoMachine in sleep mode. In this case, R15 makes a sound like 'hiccup' which seems that wake-on-lan packets arrive.

Case3: PC1 can connect PC2 in sleep mode using NoMachine with the same config used in the case 2 above.