Got Vista, I presume?
I do and sometimes depending on how things are started up, the right driver is not automatically installed for various USB audio devices.
Once I had to change the driver or find one, I forget which, and simply chose the option to have Windows/Vista look online for one. Another time I found the device in the uninstalled hardware area and just selected it & then, 'install'. A driver was found in the Vista OS.
In the audio section of control panel "Sound", whatever is connected and up & running when it's plugged into USB port it does show up in there.
YOU CAN RIGHT CLICK ON IT AND SET IT AS THE DEFAULT. AFTER A WHILE OF NON USE HOWEVER (NOT PLUGGED IN) THE OPTION OF A SECONDARY DRIVER GOES AWAY JUST AS MY OWN HAS NOW DONE. i JUST CHECKED IT.
Try starting up the laptop without it plugged into a port. Turn on the gizmo and then plug into a USB port. If nothing good comes from that, try another port. Oddly enough that can work... or has on my toshiba L350. there is a servidce pack II for Vista too... albeit it had said, beta when I downloaded it.
Weird but true.
Past all that perhaps downloading a free ASIO driver might work.
Good luck.