Hi apwin11,
There should be an option to select if these buttons should appear. You'll want to make sure it is switched to "On".
To find this:
1. Open up Start11, then go to the Start Menu tab.
2. Select "Configure Menu" and the check under the heading "Power menu options" (or under "What should the power button do?" depending on which Style you are using).
It will look like this:

Please let us know if that helps.
Best regards,
Adam McGuinness
Stardock Customer Support Specialist