I just purchased a AP 1200. It is running c1200-k9w7-tar.122-11.JA3 and 12.2(11)JA3. I am trying to upgrade to c1200-k9w7-tar.123-8.JEA. I know I must do this using FTP or TFTP. I am doing this using a TFTP server and I just can't seem to get it updated. I placed the .tar file into my TFTP root folder and telnet to my AP. I read through the whitepaper listed with the version upgrade and I can't seem to get this to upgrade. I keep getting errors. I have set the folder to full control for Everyone. I am not clear on whether I need to erase the flash first and then upgrade or copy the file up and then have it install. Can some one please tell me what I am doing wrong. I would like step-by-step instructions on how to get this done.