My camera says crd cannot be used what n i do to

Make sure you have the correct memory card.
Try another card, your card may be defective.
This camera uses the following kind of card:
Flash - SmartMedia card

This camera has to have flash - SmartMedia card and not a SD card.

If you are using the correct memory flash card, then the camera may need repair.

If this camera needs repair, it will cost too much to repair compared to the age of this camera.
One last resort would be to sell it on a site such as Ebay, if it is not working right.