10.5.8 - java.net.unknownhostexception

Hey,

Getting a java.net.unknownhostexception from a java based software/ordering application that tries to connect to a specific IP: the ip is 66.80.148.218

Now, the thing is, this computer is dual boot or whatever so it has no problems connecting to this IP using 10.4 , and no windows machines have any problems as well.

Any chance java or apple has blacklisted this IP for some reason?