Are you being logged out of all of your websites or just ? If it's everything, check your internet settings.

Sorry, but it's not possible for regular members to change their names. Management offers Moderators, Affiliates Team & Graphics Team members the chance to change their names once a year as a way to thank them for the time they devote to the site. There might be another contest in a few months where you can win a name change. Oh, and when you reach 100,000 posts you can ask for a name change.