suited connectors

Just looking at my PT database, pretty much all the other hands I play consistently (AJ+, pairs, Ax suited) are all profitable but overall I've lost money on suited connectors. I was just wondering if other people's stats showed the same or if I've just had bad luck or maybe played them incorrectly or just too small a sample size to tell (61k total hands, 3359 suited connectors, 23vp$ip when dealt suited connectors). I usually will limp in with them in late position if there's other limpers or sometimes call a raise against bad/predictable opponents or if there are a lot of people in the pot. It just seems like its so rare that I really clobber the flop and I end up folding or chasing. Even when its a multiway pot and I'm getting correct odds to chase with a flush draw it seems like very frequently the flush hits and the other passive player in the hand will bet out and show a higher flush. One of the reasons I like to play Ax suited is to be in this very situation and win a big pot from a lower flush and also be confident in big pushes/pots. Anyway was just wondering if other people have found suited connectors to be profitable or a leak.