I canna do it captain... those bits that are just awkward

There are a couple of bars in The Old German Christmas Song which is driving me to distraction and because I can't get it right (and when it's right it sounds all wrong to me) it's throwing everything out. It's not even complex... two crotchets four quavers crotchet. Arghhh! I've tapped it... hummed it. Clapped it... and I still can't play it...