Unauthorized Account?

Okay, it's been quite some time since I've played Guild Wars, almost a year I guess. After a long break I decided i'd get into it again. I re-installed Factions and Nightfall and logged into my old account. At the log in screen I got this stupid message saying: "Your account is not currently authorized to play Guild Wars. If you wish to continue playing, please click the 'Enter Store' button above and purchase the appropriate Guild Wars campaign. All I can do is delete my characters or add new access keys. This really sucks... The game was working fine for me before. Anyone know what the problem may be?

That sounds like the message you would get if your trial account had expired. If you still have your game serial numbers, I would suggest contacting Anet support from the guildwars.com homepage.

Contact support. They are the only ones who can straighten this out for you. It seems to be a common problem with people who are reinstalling the game.