You dont really give enough info how you got to this point - is it a new card or an old one moved to a new machine..
I would basically remove the card and any software that specifically relates to it. Then reboot the machine. Then reinstall the card allow windows to install its basic drivers or point it at your software disk. If you havent got a disk go to the support section of your soundcard supplier and download the drivers for your card and install them. Hopefully it will allocate settings correctly.