Hi... How are you, friends?

Accidentally I've formatted my 4GB sd card in windows: my operation system is XP Professional Edition, service pack 2.
Now, when I use the card, my digital camera doesn't recognize the memory and appears message to format the card. When I press OK, another message: CHECK SD CARD.

Some days Later, I formatted again, first in FAT and today in FAT16. My windows reads normally the card, but my digital camera.......

What can I do to recoup my card to use in my digital camera?

Thanks for your usually attention.

I imagine most manufacturers have there own formatting system and may be why it doesnt recognise the FAT system which is a windows format. What type of camera is it? Try going to the manufacturers site where you may get software to format the card. I know that Panasonic do.
http://panasonic.jp/support/global/cs/sd/d..._formatter.html
Don