I am currently experiencing trouble in upgrading my firmware version in my Nikon D4 from version 1.0 to version 1.02. After following the download and compact flash formatting instructions, the update option is shaded in red and does not allow me to go any further. I even made sure that networking was not set to on. Has anyone else experienced such a problem? If so, do you have any remedies or suggestions in fixing the matter? Thank you in advance.