interference with xbox and headset

I have a new router(D-Link) and i have a wireless adapter for my xbox 360 but it lags out of live when i use my turtle beach(wireless headset). the reason for this is that the xbox is on 11n part but its on 2.4GHz and the wireless headset is on the same frequency. Im just wandering if theres a way to make the xbox on 11n with the 5GHz frequency. i have it set to g,b,n mixed.

note: i have a bunch of other things that are 11g only (PC, Wii, PSP, etc.)