well i hadnt heard of it, but google has...
gave me back the search results, and it doesnt sound good for you;
"Error when entering Wii Shop
If your system is displaying error codes:
Or a message that says:
"An error has occurred that cannot be resolved at this time. Please try again later. Visit support.nintendo.com for assistance if this continues."
Although the console continue to operate for normal game play, these online connection errors cannot be fixed without having your Wii console serviced. Please click here for repair options."
so it looks like you need to send of your wii
(that is quoted from the nintendo site that google pointed me to btw)