windows 7 - Task Scheduler Not Waking PC Extended hours of Sleep

I have configured Tasks Scheduler to wake up Windows/PC at certain times; however, the computer does not wake up after extended hours of sleep.

If I change the trigger configuration time to:

• Sleep at: 7AM and



• Wake Up at 7:15AM

and manually put the computer to sleep, it works, but it does not work if I set it as follows:

• Sleep at 1:00AM and


• Wake up at 7:00AM

and let the computer sleep on its own.

Similarly, when I manually put the computer to sleep by doing Start-->Shutdown-->Sleep, the process works, but it does not work if the computer sleeps on its own. There are no Hibernate Options. The computer is on a domain.

Here is my configuration:

Advance Sleep Settings:

• Sleep: Never



• Wake Up timers: On

General Settings:

• Run with Highest Privileges


• Run weather user is logged on or not

Triggers:

• Daily, wake up at 7AM


• Daily, Sleep at 1AM

Action:

• For Wake up: Run program: cmd.exe


• Optional Argument: /C"exit"


• For Sleep: Run program: Rundll32.exe Powrprof.dll,SetSuspendState Sleep
  (This is in a bat file.)

Condition:

• Wake the computer to run this task

Lastly, I also installed WakeUpOnStandBy as a back-up, but it too does not work, same as Task Scheduler.

I'm not sure what else to do?