I have a 64MB data card from an old broken StreetPilot III that I would like to use in my even older eMap. But the card was locked for use only in the StreetPilot III. I get an error message like that when I put it in the eMap and turn it on.

I have a USB data card reader, and Mapsource is able to see the card in the reader. Does anyone know if it's possible to unlock the card so I could use it in the eMap?