It has been known that entire ip ranges for certain countries to be "blacklisted" but i was unaware of such a ban for this network, don't know the reasoning behind it so cant say much, you could pop into the channel on quakenet, it's not an official channel as it's only me and jaggy that idle there to keep it active.
Im not sure, but it could help if u make new IP, do u know how to do it? In XP u look ur internet in the right down corner, and then right click and choose repair.