I need some help with my 70-200 2.8. The lens is not showing a connection with the camera body. I've tried it on both my 40D and 1Ds II and I'm showing an error message on both bodies. I've tried cleaning the connection points with the eraser head but no luck. It is a UW lens if that makes any difference. Is there anything else that I should try before sending it off to Canon?
Thanks for your help
Sid

