[font color=\'#000000\']Hi Robert,
Forgive me if this is obvious, but did you try reformatting the card in the D60 itself. I've read somewhere that if a card is formatted in the pc or mac or even in another camera, the D60 may not read it properly. Worth a try if you didn't do this yet. Hope it helps.
(check page 135 of the D60 manual--remove, re-insert, format)