R4i Pocket/DSTT errcode=-81

i've put the latest DATs and when i tried playing KORG i got this errcode=-81 what should i do?

errcode=81 : Caused by fragmentation on your microSD. Backup microSD to PC, then Full format with the Panasonic SD Formatter to rectify.

and this error also shows up on Crafting Mama
Post Merge: [time]1301798523[/time]
oh tnx yo!