Power schedule function not working,

HELLO,
I AM HAVING A PROBLEM WITH THE POWER SCHEDULE ON MY PR 4100. I DO NOT THINK IT IS FUNCTIONING FOR THE SCHEDULED POWER DOWN OR RECOGNISING THE TIME ACCURATELY. I HAVE TRIED THE FUNCTION IN HYBERNATION MODE AND POWERED DOWN. ONLY ONCE I THINK DID THE POWER CAME ON ONE HOUR AFTER THE SCHEDULED TIME. I AM REPEATEDLY CHECKING THE FUNCTION TO POWER DOWN AND I DO NOT SEEM TO BE GETTING AN OPERATION FROM THE FUNCTION. I BELIEVE THAT I HAVE A LATER SOFTWARE IN COMPARISON TO THE ONE IN THE MANUAL AS I HAVE NOW GOT MEDIA AND ITUNES FUNCTIOON ON THE LOCAL NETWORK. I REALLY WANT TO GET THE POWER SCHEDULE TO OPERATE FOR ACCESSING REMOTELY. I THINK IT IS A NUISANCE NOT TO BE ABLE TO DO THAT. I WOULD REALLY APPRECIATE ANY ASSISTANCE WITH THIS PROBLEM.

Thank you
Harminde Singh