Pei,
There are several things that you should try to get your interface recognized again. First, I check to see if the device is being recognized in the Device Manager. If you cannot find the device there, it may be that it has been prematurely stopped. I would then recommend shutting down the computer, and removing the PCMCIA card. Once it has been removed reboot the computer so that it can recognize that the slot is empty. I would then try to shut down the computer and reinsert the card and restart once again. Once you do this you should be able to recognize the card in Measurement and Automation Explorer. If not this would be a good time to try to reinstall the drivers. You might also try to install the card on a different laptop to make sure that you are able to recognize the card in general. Hope this helps!
Andy F.
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National Instruments