Just got my son a DSi and his R4 card doesn't work on it. It just says "an error has occurred...". What do I do to make this work? Do I need a new R4? Do I need a new Micro SD and R4? or can I just upgrade the firmware for my exisiting R4? Thanks...and I am totally clueless about all this so if you could answer me in plain english that would be great I am in Ontario Canada.