Canon Ixus Memory Card Error

Problem with memory card!?

Hi I have a Canon Ixus 400 digital camera and whenever I put in the memory card (123MB ScanDisk) and turn the camera says "memory card error." Also, when I connect the camera directly to the team computer says there is no memory card found … any help much appreciated:]

Insert the card in your computer click right to select the disc format, formatted the card if the site again in the camera and see if it works, if not having to replace the card, because it is falty