One of my regular users on my forum hasn't been able to access the forum for a week or so now. She will input her username and password into the login fields, click on login, and then it takes her back to the login page. No error messages. Nothing. I've tested her user permissions and I don't have any trouble accessing the boards. So, after a week of trying everything from emptying her browser's cache and cookies to changing her password, she decided to try registering with a new username and password. She registered and was then immediately taken back to the login page. She tried logging in with this new username and the same thing happened. What else can we investigate? She's been using the forums for just over a month now with no problems, so I'm puzzled as to why she'd be having trouble now.
Thanks!