I have a Panny GF1 and the 14-140 lens and love it. I am, however, having a problem using my old Nikon Al lens with it. I have a Nikon adapter which I bought from eBay and I'm able to focus and fool around with exposure but when I try pressing on the shutter button, I keep getting this message "Please check that lens is attached correctly." Has anyone experienced this? How do I go about using my old lens? Thanks a million.