Hi I havent visited this website in a long time.(Because I lost My AR and ACWW for DS)

Anyways I bought a SD Card but when I plug it into my Wii it says The Device INserted In The SD Card Slot Cannot Be Used.

My SD Card says:

Optima SD
2GB

Can someone help me please?

If That SD Card wont work then I have to wait untill Christmas to get a new one -.-