Just a very few CD's so far imported have shown a list of tracks and notice that the 'freedb.org' database link does not work. Do an internet search for that website takes one to the Magix.com GB website so looks like Magix have turned off that avenue of adding track details.
My understanding is that the "freedb.org" database has actually been closed by its original developers. That is the reason you cannot access it! I think Magix may have at least partially taken it over, hence the link you found.