This site isn't exactly known for the most proactive administration. The ip needs to get banned immediately and reported to the ISP. Reverse DNS reveals it to be a static ip provided by a hosting company called "The Planet" in Texas. It is likely a compromised rented server, but equally possible it could be a rented server which some script kitty is using for hacking purposes. I sure hope they didn't rent that server on daddy's credit card, cause if they did, they are in for a world of hurt.