Well I'm not sure what else you have going on, but the only explanation that I can offer you is that the button 5 behavior doesn't manifest itself until after you soft reset. So if you install voice command button 5 will work great until you do you first soft reset, at which point it will break (and stay broken). Same with my patch... when you install it, it will not work until you soft reset (which is in the instructions). Once the device comes back from the reset button 5 can then be re-assigned to Voice Command.

Also anytime you re-install voice command the process starts over--the first time you soft reset afterwards button 5 will break again, requiring you to install the patch and soft reset in order to regain button 5's proper functionality.