Forum Thread: Changing Aperture on Nikon Lens with a Canon Body

I used to have a Nikon, with which I used a 55-200mm lens, and have since bought a Canon 7D, but don't really want to sell my 55-200 if I don't need to. I therefore bought an adapter so I can use the lens with the 7d, however, because the lens' aperture is changed digitally, the Canon body doesn't recognise this and I therefore cannot change the aperture the lens while using it on this camera.

Is there anything else I can buy to mean I CAN change the aperture on the Canon, or is there something you know that I don't?

Thanks guys =)