1) Is there any hardware button to turn it on/off?
2) Can you see the device at device manager (start-run-"devmgmt.msc")?
3) Is the card looking for networks and not detecting them or is it just not working?
4) What is the network you were connecting to before?
Finally, that question, because it's generic (not really related to Fujitsu, but to Intel cards), can be asked on the Notebook General section. And sure it would get more attention there. I, for example, never visit this section... I just stumbled on this thread. Really.