Hi ! i am new in backtrack , last 2 month i am using now i have installed backtrack 5 but i my wireless modem does not working in aireplay-ng , and i do not even get any handshake, can someone help me please?

root@bt:~# airmon-ng


Interface Chipset Driver

wlan0 Intel 4965/5xxx/1xxx iwlagn - [phy0]
wlan2 Ralink 2573 USB rt73usb - [phy2]


root@bt:~# lsusb
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 002: ID 1bcf:05cf Sunplus Innovation Technology Inc.
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 007: ID 13b1:0020 Linksys WUSB54GC 802.11g Adapter [ralink rt73]
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 064e:a103 Suyin Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub