Go to the login box and click on "Forgot your password?" (or go directly to https://gatecoin.com/resetPassword/).
Please then enter the email address you used to register on Gatecoin and your User ID. Once these have been confirmed we will send you an email with a link from which you can create a new login password.
However, for security reasons you will need to wait 24 hours until you are able to trade or transfer any funds.