we have an explorer with third row seating. recently the (60/40) 2nd row seat wont lock into place, and the handle on the side of the seat also broke at the same time. The (40) seat we are unable to use because of this. The (60) part we also having problems. It wont lift up into cargo mode, so we basically are not touching it, incase it breaks. whjat do we need to do to fix the 2nd row seats?