hi
You Need to check your Cover once , generally their is one chip behind the Cover case which is fitted or rather we can connect with Phone , which help in working of Flip cover , i had faced the same issue , actually what i had bought from local market consist of case which doesn't had the chip and i was trying to get the s-view work for the same i had actually formatted twice my phone , But once i was checking in the shop i found this , it appeared silly but this was only the reason, soon i bought the s view which had chip on the back .. plz check from your eye and better don't buy online as by one of the friend did the same , and he was also was facing the similar issue,
work on this and you will can see S-view
thanks
Parag