How to get driver for Belkin 54g rt73--BB-C4-Angstrom distribution

Hi all,

I am using Belkin 54g wireless dongle..
Its getting detected on command lsusb

Bus 002 Device 005: ID 050d:705a Belkin Components F5D7050A Wireless
Adapter

its having rt73 chip..
but on command iwconfig

lo no wireless extensions.

eth0 no wireless extensions.

How to fix this..