I was having a problem with this web page getting to load a while back and I rebooted and flushed my dns out. Seemed to help as it loaded easily then. But if you can't even get on OSI, you may want to try that method if you haven't already started reinstalling. Don't know it may help you.
PS - Hehe, sorry about the humor up there, was just trying to keep my frustrations light. Hey, I'm standing there as a ghost with all my stuff decayed by now. Hope you at least get on OSI as I know the daily dose of UO jones.