To log in, you need to be a captain, co captain or alternate with an email address in the system. You can find the email addresses of captains here. Please confirm that your email is on this list. Sometimes spaces might end up in email addresses by accident.
When you are added to the site you should be emailed with your new password automatically. Sometimes if copied and pasted a space can accidentally end up in the password. Please type the password into the proper box.
If you are able to log in, but get kicked out immediately, chances are you do not have cookies enabled on whatever browser you are using.
When all else fails, email your administrator using the contact page.