I tested this program---repeatedly. It simply doesn't *not* wake up the computer when the computer goes to sleep.

There are other options that are nothing, if not more elegant and user friendly --- and effective when waking from sleep.

Alarm Clock 2.4.5 is one that has never failed me. All it takes is a one-time "authorization" to wake up your computer from sleep. And, it's free.

I use a simple (68k) and very functional script (iSleepSound) with iTunes to put my computer (and myself) to sleep after a set amount of time.

Then, I use the alarm clock of my choice (usually Alarm Clock 2.4.5) to *reliably* wake me up.