If you are a member, and if you are logged in, but find you are getting a message asking you to log in, then the cause may well be the 'Cookies' in your computer.  Pleaes check your 'Cookies' setting in your computer, and set them to turned 'ON', and that they do not have strick rules applied. If you don't know what Cookies are, please ask a friend, or your local computer shop person, or someone at your local library.

The kinds of questions the person who helps you might want to ask you could include:

What Browser are you using? 
And what version number is that Browser? 
And what kind of computer are you using.