WIndows unable to format Sandisk SDHC 4gb class 4 memory card.

I have sandisk  4gb SDHC memory card. I use this card for  my camery. When i connects my memory card to pc, windows not even able to format the memory card but also it is showing that memory card is a 30 mb sd card instead of 4gb. And when i inserted card in my camera it is showing an error that "format the memory card’. 

Sounds like the card has failed.

@tapeworm i also tried to format sd card from disk management in control panel but unable to format. Its showing generic raw format card. Can you help. I want to recover my pics. I have tried every alternative possible.

Has this unit been dropped by any chance? Looks like a dead stick to me. Is this still under warranty?