USB Wireless Detected. But Not usable.

I have connected a ZyDas USb dongle to my beagleboard running Angstrom
2.6.35-rc3 PM kernel.

When I plug in the USB, I can see that the USB device is detected, But
zd1211 firmware is not even requested.

root@beagleboard:/# [ 434.559387] usb 1-2: USB disconnect, address 2
[ 437.118957] usb 1-2: new high speed USB device using ehci-omap and
address 3
[ 437.276336] usb 1-2: New USB device found, idVendor=0ace,
[ 437.290527] usb 1-2: New USB device strings: Mfr=16, Product=32,
[ 437.306396] usb 1-2: Product: USB2.0 WLAN
[ 437.312133] usb 1-2: Manufacturer: ZyDAS

I dont see this issue when I am connecting a ASIX USB ethernet port. I
think I am making some config errors.

Anyone faced this issue before?

How do I check if zd1211rw is properly loaded?