I just upgraded from the Wii Fit to the Wii Fit Plus and have been working on unlocking Island Cycling courses.  Three times today, in the middle of a course,  the screen would go all black with some white lines through it and make a loud "snow" noise.  I have not had it do this on any other of the Wii Fit Plus games.  Any clue why this is happening?  (I did remove the disk and cleaned it and put it back into the system and it still did it.  There doesn't appear to be any noticeable scratches on the disk either.)

Thanks for any feedback/support,