Bout two months ago I brewed my first pumpkin ale with spice, molasses, brown sugar and 6lb of Libby's caned pure pumpkin. It fermented good for about three weeks then I bottled it. The final gravity was at 1.017 but now It is having trouble carbonating. I used 3/4 cup corn sugar boiled with two cups of water and I always have good luck with this in other beers. Is there some thing I can do to get this brew up to snuff? Or any suggestions on what might of went wrong with the yeast?