Intel centrino 6150 11n rates behaving badly

[bob sagget]

Ok please excuse this message its my second ever.

I currently have all the iwn options enabled(that im aware of) and built
into the kernel.
In my "/etc/rc.conf" file I have

wlans_iwn0="wlan0"
ifconfig_wlan0="-ht WPA SYNCDHCP"

Ok without "-ht"

"ifconfig wlan0"

media: IEEE 802.11 Wireless Ethernet MCS mode 11ng
ssid myrouter channel 1 (2412 MHz 11g ht/20) bssid xx:xx:xx:xx:xx
country US authmode WPA2/802.11i privacy ON deftxkey UNDEF
TKIP 2:128bit tx power 15 bmiss 10 scanvalid 60 bgscan bgscanintvl 300
bgscanidle 250 roam:rssi 7 roam:rate 64 protmode CTS ampdulimit 64k
ampdudensity 8 -amsdutx amsdurx shortgi wme roaming MANUAL


With


"ifconfig wlan0"

media: IEEE 802.11 Wireless Ethernet OFDM/12Mbps mode 11g
ssid myrouter channel 1 (2412 MHz 11g) bssid xx:xx:xx:xx:xx
country US authmode WPA2/802.11i privacy ON deftxkey UNDEF


After I put "-ht" back in rc.conf and rebooted the system,I went up stairs
and tryed to ping google and I got a "host name look up" error. I typed
"ifconfig wlan0 -ht" (with it already in "/etc/rc.conf" i typed it
manually) and tryed to ping google again with success.

30 packets transmitted, 22 packets received, 26.7 packet loss
round-trip min/avg/max/stddev = 26.548/50.575/118.950/26.572

upstairs I noticed OFDM/18Mbps. Downstairs it's dropped as low as
OFDM/6Mbps (currently without any connection im sitting at OFDM/24Mbps)

"wlandebug +rate"

amrr_node_init: non-11n node
AMRR: nrates=0, initial rate 0
amrr_node_init: non-11n node
AMRR: nrates=12, initial rate 96
link state changed to up
AMRR: current rate 72, txcnt=11, retrycnt=16
AMRR decreasing rate 48 (txcnt=11 retrycnt=16)


yesterday I had some internet, today I am getting nothing at all. "status
asociated","ssid myrouter" like there is a connection but when I ping
google I get a "host name lookup" error. (yes there is dns in
/etc/resolv.conf)