How do i change my router to N-only for my xbox 360 wireless N adapter

I have a Netgear N600 Wireless Dual Band Router

:)

 

MTU error for Network mode "Mixed(N for xbox)

I have a wireless N adapter for my xbox 360 and a wireless N router (Linksys WRT160N). whenever i am on mixed network mode for my router (N for the xbox) i get a MTU error when i run the network test and i cant play black ops (get no server available error),
but when i use "network mode: G Only" i get no errors and can play my games normally. Why does it do this? and is their a way to fix my N mode because i would like to take an advantage of my N adapter and N router.

 

Xbox 360 wireless n networking adapter

How much distance should I expect my wireless n networking adapter to cover between my router&my xbox 360?

 

Hi Forrceful,

Your router should automatically support N (Referred to as 802.11n), which has become the standard for wireless networking. I found this information form this

Netgear article

There is no option to remove support for B or G, (B is no longer manufactured apparently).

The letters refer to frequencies and speed, and each new version of hardware capabilities.

Read More:
http://homenetworkadmin.com/wireless-b-vs-g-vs-n-what-is-the-difference/

Having another letter available should not affect the network, and should be running properly without configuration if your having connectivity problems.

If you are having connectivity problems, then the letter is not the issue, but we will try to solve it