Hacking mario kart save problem???

[wim6]

My son wants to play mario kart via the usb loader, it always worked up untill today, when i go and play the game it shows me the press a button screen and immedatly pops up a screen which says:

Could not write to/read data
check out the manual blablabla

Anyone no what th problem is.

I used any title deleter to search for a save game for mario kart but i couldnt find one...

wii 4.2e cfgloader v46 cios 38r14