I've just install ndiswrapper without a hitch.

iwlist wlan0 scan is showing my networks fine.

but when i type "route" it does not show the default gateway. from windows i've determined it's i try typing
"route add default gateway" but it says "?(SIOS)ADDR: Network is unreachable"

i also have brought it up using
ifconfig wlan0 up

1. what might be causing this?
2. what does this do? ifconfig wlan0 up
doing this seemed to add this line to the route output * and whatever the last field is

edit: i can't even ping my router.