Tried enough times to know that I can't get any further on my own. :) This is the error I get when I start the program and try to log in:
This is where I would have inserted a picture, but the window that appeared when I clicked the button didn't make much sense to me. Here's the text instead:
An error occured while attempting to sign in to PokerForum.net:
Method not found: 'Boolean System.Deployment.Application.ApplicationDeployment.CheckForUpdate(Boolean)'.
Perhaps you already have SP2 for Windows XP, which is unrelated. I was referring to SP2 for the .NET Framework 2.0. Those are two different service packs.