Windows can't identify Samsung captivate glide
Finally got solution after 2 days of headache. Problem is my USB data cable. I've got original Samsung's USB data cable with phone but unfortunately it is not working. Though charging can done via this cable. I've tries few Chinese cables also but problem remains there. But as soon as I use my friend's original Samsung cable it working like a charm.

So any of you have this problem first thing to do is check from another usb cable. And importantly go for OEM's original cable.