Kingdom Hearts 358/2 Days Help!

Ok so i downloaded Kingdom Hearts for Ds and I got it to work yada yada yada....... but if I go to the shop in the grey area (the moogle) and i try to buy something or synthesize something, if I try to get out it just freezes. This is annoying because i have to buy some stuff and I need to upgrade my keyblade, get potions and ethers, get new panel stuff,etc. Please somebody help!

Try take all your information off of your card onto your pc, Format your card and then put it all back on there... This should help against fragmentation of files.