Back up your games, format the MicroSD with the Panasonic SD Formatter then copy the files back on.
If that doesn't fix it, it's possibly AP and you'll need to wait for an update to the extinfo/infolib.dat files.
Do you have a real R4 (or 1:1 clone)?
If so, use WoodR4. 1.12 is the latest, but there seems to be a 1.11 version modified to work with Pokemon Black/White.