Seems a tyoical DOA (dead on arrival) case. Return it.
I bought a new 4GB SD card. It doesn't work in any of my 2 laptops and a pc. I have a SD reader with USB cable and laptops have own ports. It gives error I/0 device error or "Insert disk". It says it is RAW and doesn't allow me to format. In Disk Management there is no partition and says "Unreadable". Tryed HP formatter and SD Formatter tools.
Don't even think about asking for Lock/Unlock thing on the card.