driver for multimedia card

You will need to determine what Diamond called this card.

They have their drivers orginized by the name of the card (Monster sound, S100, etc)

Here is the link to the legacy driver page.
http://www.diamondmm.com/support/diamond/default.asp?menu=support

Remove any spaces from the pasted link.

If you are running XP, you may need to identify who's sound chip is on the card, and download the "reference" drivers from them.

Check out www.driverguide.com for help identifying the chip, and for more links.

Chas