Hey mate, unfortunately I don't know that you're in a supported region. OXM disc #124 has a copy of the update on it, I believe. You can try updating with that, to see if that resolves the issue. However, if the console was purchased used and you do not know it's history, it's definitely a possibility that it's been modded. In the future, I strongly suggest you purchase consoles new, to avoid this sort of issue.