[alpacassei]

The ladder rungs are too smooth and wide for her to grip onto properly. Russians aren't very good climbers because their paws are covered in fur on both sides. As Cypher said, they're also dangerous as they can get caught between the rungs.

The bendy bridge idea sounds like it would work well (though if the coconut moves around too much, she might not use it still), or you could remove the hanging part as well as the ladder and just have the coconut on the ground.