Take a look at error at the bottom of the log file, “%PROGRAMDATA%\Tobii\Tobii InfiniteScreen\Logs\InfiniteScreen-<date>.txt”, and copy/paste it here (just the last entry NOT the entire file).
(If you can see “AcquireDeviceNumber()” anywhere in the last entry then you can try following the steps described here:
http://developer.tobii.com/community/forums/topic/ise-fails-to-start-with-could-not-initialize-where-is-the-logfile/#post-4654)