Amazon PRODUCT in a post plugin.... not working for me..

I have installed this plugin...
and it does not work.

I input the keys.. both.. and
it show nothing..
i write a post with it... and my words
come out but no images...
no product description...
nothing comes out

I wrote the developer...
and he wrote back..
gave a couple of suggestions
but that did not work...

can anybody shed some light on this plug in.

Does anyone have it working...
does it need a particular theme



Thanks