Hacking Black screen with USB Loader

[Boxman X]

I get a black screen while trying to load SSBB from SD with SD/USB Loader 1.5. It is the NTSC-J version of the game.

I have the following installed:
cios36 rev10
IOS38-64-v3609
IOS53-64-v4113
IOS55-64-v4633

Any clue as to my problem? Any more info that may be needed?