Hi,
Did it read the same card before ? If new card, what is it capacity ? Can other computer(s) read this card ? Please note: many computers can't not read high capacity cards. I gave few examples few months back: we bought nearly 1 mil dollars for 4 CISCO MDS9000 series directors and none of them can read cards greater than 2Gb. Other worse example, my new 100,000 dollras car can't read NTFS cards and does not know cards greater than 4Gb, its HDD is only 10Gb (yes ten).
Regards.