help please

I'm new to the sight and am needing some information. I recently purchased a Sony dslr- a200. I was told that all of my Minolta Maxxum lenses would work. However, when I attach them I get the message: shutter locked no lens attached. They go on fine and click in place. The lenses that I am having problems with are all Sigma lenses -a 28-200mm/ a 75-300mm/ and a 28-70mm they are all autofocus. I also have a Minolta 49mm and a Photax 52mm that work fine. Any suggestions? Help? Thanks.

I have a very old Sigma 75-200 f/2.8-3.5 and works with my A100.
A dum idea: cleaning the lens contacts with an eraser?, contact Sigma and see if they can reprogram?
Hope somebody else here posts a better solution.

Contact Sigma about the problem. Some older lenses need to be re-chipped to work on newer bodies.

Hi,
I am new here too. Just an idea to get you through till you get an answer (cleaning might work) look in your camera manual for defeating the shutter lock.

Defeating the shutter lock wont work if theres no aperture control. Roscoet - are they working fine on your film body? And, you have a 49mm and a 52mm? Are you sure those aren't the filter threads?

And welcome to the forums!