After browsing through the website, you must select the blue button on the top left side of the page and select Log Out. If you do not log out, the system will keep you logged in.
The key is to look at the blue icon on the top left side of the page. If it says , you are already logged in and can begin to browse the website. If it says , you must login before browsing the website.
If you try to enter your username and password when you are already logged in, you will get an error message that says "Access Denied".