that is only for a/b/g wireless not for N so it wil not work even netgear support don't have the right solution for this issue, I was communicating with them for more than 4 months with no solution, they are not capable to solve this issue.
so i think they do not make a new firmware because it is not possible for this issue. please let they come out and say :"idd it's not possible."
butt they don't do that and just bring us once at the time a update with minor chances. so please give us good updates.