Cranberry plant - Is it dead?

I bought a Cranberry plant. Used ericaceous compost. Watered from the rain water butt. Started off with green leaves, that have turned progressively rusty, until now ...

http://www.keepandshare.com/photo/view.php?u=326094&fv=y&vo=lt

Is it dead? If not, is it retrievable?

The leaves, although brown, are fairly well attached to the stalks.

One thing I have not been doing is feeding it. I recently got some ericaceous plant food which I have just started using on it, but it is too soon to tell.

 

Never grown cranberries, but that looks very dead to me :(