R4 Ultra problem

Im having serious problems with my r4 ultra. First of all when I put my memory stick into my computer it said there was nothing on it even though if I went into properties it said the memory stick was full.
So I had to format the memory stick and now my r4 doesnt work at all, It just says loading.
Does anyone know what to do?

When you formatted your card, you deleted the firmware files.You need to put the firmware files back on your card. www.linfoxdomain.com/ds