I have an old (crappy) dell optiflex (tower) with really low RAM - 490mb. Can't get wired internet to work (whiich I wanted to do - I have an old 3com tornado ethernet card but couldn't get to work through a Tuts modem) so I bought a Belkin n750db/n900db USB wireless adapter. (I originally bought the 150 which showed up in ubuntu but was too slow). For the 750/900 I did a dual boot of windows xp and ubuntu. It won't even show up (it only shows up in the windows boot, but incredibly slow, but will not show up at all in ubuntu.)

Can anyone tell me how to get it to work in ubuntu 11.10?