Wii freezes when SD card in accessing channel management menu

I have two questions mainly. Why does Softmoded Wii freezes when accessing SD Card in Channel management (the place you can delate or move channels)? (

var:http://www.wiihacks.com/wiihacks-newbie-discussions-forum/89798-wii-freezes-when-sd-card-accessing-channel-management-menu.html