WiFi firmware request fails while enabling wifi on beagleboard for android

Hi all,

  I want to enable Wi-Fi on beagleboard for android using DlInk DWA
110 adapter based on Ralink chipset.

  I had selected the rt2500,rt2570,rt73 drivers from "make menuconfig"
and rebuilt the kernel. By then, when booted on the board, board
detects the adpapter with wlan0 interface.

  But when I tried to "up" the WiFI using command " ifconfig wlan0
up", it gives following error,

# ifconfig wlan0
rt73usb 1-2:1.0: firmware: requesting
init: untracked pid 859
phy0 -> rt2x00lib_request_firmware: Error - Failed to request
error: SIOCSIFFLAGS (No such file or directory)

From google arround, I found that it is related to permission problem
but could not found the solution. Can anyone please tell the issue. I
will be really grateful.

Waiting for reply..