M3DS Simply / Pokemon Diamond Error

I have an M3DS Simply,
and with Pokemon Diamond,
Pal park I ported some Pokemon over,
and when it comes to catching them, it will open up the battle,
then as soon as the Pokemon and trainer get into place it will freeze.Does anyone know the problem with this?

Backup all your data and reformat your MicroSD.

Replying to #2

Ill try that, if it doesn't work, I'll post back.

Sure thing, reformatting usually fixes freezing issues.

Ummm, FAT or FAT32?

Fat32, if that doesn't work, just Fat.

Replying to #6

Both Fat and Fat32 I still freeze D:

What brand is your MicroSD?

Replying to #8

Kingston
2GB Micro
SD