Try going in your profile and click the ยป Delete All Cookies link. You will have to log back in afterward. If that doesn't correct the problem, you should check your browser's cookie manager to be sure it isn't deleting the forum cookie when you close your browser... Let me know if either method fixes the problem, ok?
Bill that is the correct way in IE...unless they have a program called window washer, which by default is set to delete cookies, tmp Internet files etc when the browser is closed, in that case then they will have to change the settings in that program , which you can choose the cookies/web site to keep or delete.