SSR 2013 scheduled backup while computer in sleep mode

I have SSR 2013 trial version installed on Windows 8 64-bit laptop which is normally in sleep mode when not in use.

I have setup a "backup my computer" job scheduled to rum once every week. I have also created a "scheduled task" in Windows Task Scheduler which triggers one minute before the scheduled backup time. I use VProTray.exe as the "action" in the Task Scheduler for it to run after the laptop wakes up. BTW, I just use this action (VProTray.exe) but it has no specific purpose to be invoked.

 Here is the problem: the laptop wakes from sleep but the scheduled backup never runs.

Is it some limitation due to the trial version (everytime I manually "Open Symantec System Recovery 2013" by right clicking the icon in the system tray, it asks for activation) or is it something I am doing wrong in the setup - either in Windows Task Scheduler and/or SSR 2013)?

 TIA

Anil