ath0 doesn't work in turbo mode 11a

[Marcos Biscaysaqu - ThePacific.net]

Hi there.
    Im trying to setup my wireless card on Freebsd-5.3 stable, Im runing 
an commercial AP in 11a turbo mode but I can't connect my atheros card 
to it. work perfect in 5Ghz but doesn't in turbo mode. it is any special 
setting to do this, or is just a driver problem?
I tried all the channels, different ifconfig options but I can't get an 
associated status in turbo mode.



ath0: <Atheros 5211> mem 0x42000000-0x4200ffff irq 11 at device 14.0 on pci0
ath0: [GIANT-LOCKED]
ath0: mac 4.2 phy 3.0 5ghz radio 1.7 2ghz radio 2.3
ath0: Ethernet address: 00:01:24:70:54:a9
ath0: 11a rates: 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
ath0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
ath0: turbo rates: 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps

`ifconfig ath0 ssid XXX media OFDM/54 Mbps mode 11a mediaopt turbo`

thanks
Marcos Biscaysaqu