I am new to these things and it's driving me up the wall trying to find this out. I have downloaded the latest IOS which came in as c1200-k9w7-mx.123-8.JA4 Through the web interface the AP will not upload the image. So I search and find c1200-k9w7-tar.123-8.JA4 and it still won't work. I add .tar to the end and still no go. I don't know what I'm doing wrong and every Google search I do assumes you have the correct image. I don't know if I have the correct format of the image, how do I know, and how can I fix this?