For a while now, theres been some technical problems with the Itunes feed. The problem is that the old metalscapeonline adress is shot, wich makes the feeds DNS server point to an invalid adress. Hopefully this will be fixed in the coming 2 or 3 days. But if you cannot wait or if the problem wont be fixed, you can just resubscribe and it will work fine again. Sorry for the inconvenience and hopefully it will all be back to normal soon enough.