If the leaves have turned yellow now, then it's quite normal. They should turns a nice golden yellow just before dropping. This variety is a form of Rosa rugosa and as such is pretty amenable to a wide range of situations. I would leave alone until next year. I think you are expecting too much too soon from it. Once established, two years after planting, it will reward you with the flowers.

I agree wtih Fractal. Give it a good feed in spring to help it establish