PTP will be off if it is a sever os or 64 bit os.This is by design.
If this is not the case go to start-->run type luall and click ok>this will lunch live update.Run it and try..
If not helps reinstall PTP.You can do it as follows
GO to add/remove programs
Select SEP,click on change--->next-->modify-->next,Here select this feature not available by clicking on the small box neat PTP.keep on click next until it finishes.Follow above steps once again and select this feature and sub features available for installing it back...