sorry if this is posted multiple times.
I am requesting help on configuring wifi.
I'm using wifistix + 400Mhz + STUART
The board is new but came with version 1082

What is the difference between wlan0 and mwlan0?

here is my /etc/network/interfaces file:

iface lo inet loopback

#auto usb0
#iface usb0 inet dhcp

auto usb0
iface usb0 inet static

iface bnep0 inet dhcp

auto eth0
iface eth0 inet dhcp

iface wlan0 inet dhcp

auto mwlan0
iface mwlan0 inet dhcp
        pre-up /sbin/iwconfig $IFACE essid any txpower 100mW

When I type:
# ifup mwlan0

blue lights flash momentarily and I get:
udhcpc (v0.9.9-pre) started

However, it doesn't pull an ip from my wireless access point and I get
kicked off of my usbnet connection or something.  All I know is that my
terminal session locks up.

please help - this is making me insane.

Thank you very much