Ik heb het probleem in Vista gevonden... Was een instelling.
Bij mij werkte het en Asus zelf schrijft er het volgende over:
This is VISTA OS problem. VISTA does not allow system to enter Standby mode, if "Allow this device to bring the computer out of standby" for an USB or PS/2 wake supported device (such as mouse or keyboard) has been checked under "Device Manager", while the used USB or PS/2 port has not switched its power mode to +5VSB, which allows delivery of standby power to USB or PS/2 ports under soft OFF state.
As VISTA enables this option per default, and motherboards often set USB power modes to +5V at the same time, this two settings may result in conflict, hence causes this trouble.
To fix this, simply uncheck "Allow this device to bring the computer out of standby" for your USB mouse and PS/2 keyboard under "Device Manager", if you do not desire to wake the system via your USB mouse and/or PS/2 keyboard.
If wake from USB mouse and/or PS/2 keyboard option is required for your application, simply turn off your PC, set the particular USB port used to connect your USB mouse, and/or your PS/2 port(depending on if you wish to allow wake from PS/2 device) to +5VSB as per the instructions in your user manual, then turn it on again, and disable "Allow this device to bring the computer out of standby" for devices you do not wish to use to wake your system from, and your system will be able to enter and wake from standby mode in your desired manner.
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