Within your web browser's address field, type: yourdomain/cms (replacing "yourdomain" with your actual domain name) eg:
A login screen will appear. Enter your username and password provided to you by your web designer.
If you have forgotten your password, simply click on the "Forgot your password?" link and an email will be sent to the email associated with your account. If you don't receive an email, check your junk/spam folder. If you still haven't received the email, please contact your web designer.