How much RAM do you have? And 64-bit ready means that it can handle 64bit, but does it mean that it is 64 bit? Also, try giving a more detailed description of the problem. Is it not loading all the way? Does it have choppy graphics? Etc, etc.
Sorry for being late to respond back, but Thanksgiving doesn't slow down much over here.
Is this online? If so, it could be your latency, if it's not online, then it could be a myriad of problems. Unless it's solved, which it could be...Erm. Is it solved? I don't want to look like an idiot posting some huge response to something that's already solved. :3