Replying to !!!!!!!!!!!GOPRO HELP!!!!!!!!!

as posted in NSG.
K, so i just got a new card for my gopro hd and wanted to update the firmwire...
i put in the new card (Lexar PLATINUM II 32gb sdhc 100x) in the gopro. and plug it into my computer (MBP) and nothing happened, it didnt show up on my desktop and the Gopro didnt do a thing.
It worked last year....
so i tried the same wire with my NikonD300 and it works fine.
but the gopro doesnt... it doesnt show up or anything, and now it died... Halp.

if your rly lazy.... go pro doesnt connect with mac, now its dead. hep.