USB Wifi Dongle problem with Angstrom on uSD


I tried Netgear USB wifi(AR9271) with Angstrom on eMMC was ok, BBB can realized it and display wlan0 when type command ifconfig but with Angstrom on uSD, BBB cannot realize the wifi module, I guess the wifi driver package didn’t deployed and installed.
On the other hand, I cannot install the Wvdial tool to manage the 3G module on BBB while I can install Wvdial on ubuntu version, have any one know why?
Have any one can resolve this problem?