FreeBSD-11.0-p8 Wireless setup

[Baho Utot]

I have a realtek usb wireless device.
It will work using dhcp with an open wireless network.
If I change the security mode to WPA2/WPA Mixed Personel if stops 
working and give me no route to host error whne I try to ping a host

I have this in /etc/wpa_supplicant.conf
network={
     ssid="example"
     psk="my key"
}

wpa_supplicant appears to be working.

If I try to add the default route by:
route default 192.168.1.1
it responds telling me it is already in the tabel.

How can I trouble shoot this more?

Thanks