I am sorry that you are having difficulty logging in and we are here to help. When you mention that you 'joined' but can't 'log on', what do you mean in terms of log on? If you used your email address to join/sign up the we should have automatically sent a confirmation to the email you provided with instructions on how to log in.(in your email check your spam folder just in case)
If we did not send you a confirmation email let me know and we will help get you set up.