N73 problem In my Nokia N73 ME new memory cards are not working, I dont no what is the problem? I buy new memory card its not working, also shopkeeper tried atleast 4 to 5 times new memory cards, non of them was showing in N73 ME but if I inserted my old one its working... Can you help me please sir???

Use only miniSD cards approved by Nokia for use with this device. Nokia utilizes the approved industry standards for memory cards but not all other brands may function correctly or be fully compatible with this device.
Use only compatible miniSD cards with this device. Other memory cards, such as Reduced Size MultiMediaCards, do not fit in the memory card slot and are not compatible with this device. Using an incompatible memory card may damage the memory card as well as the device, and data stored on the incompatible card may be corrupted.
Press menu and select Tools > Memory. You can use a compatible miniSD card as extra storage space and for backing up the information in the device memory.
To back up information from the device memory to a compatible memory card, select Options > Backup phone mem.
To restore information from the compatible memory card to the device memory, select Options > Restore from card.
To eject the memory card, press , and select Remove mem. card.
Important: Do not remove the memory card in the middle of an operation when the card is being accessed.
Removing the card in the middle of an operation may damage the memory card as well as the device, and data stored on the card may be corrupted.

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