Photos are being streamed to my Samsung TV in low res

I’ve got a new Samsung TV and in order to get it to connect to my MyBookLive, I’ve had to turn on Twonky. But when my TV displays images from MyBookLive via Twonky, low resolution versions of the photos are displayed. Its not a problem with my TV because it displays full resolution photos from other boxes and from USB keys. Any ideas what the problem is?