Click on this link:
http://www.bulletinboards.com/view.cfm?comcode=ftpmb

The initial step for you will be to log in by typing in your password
in the appropriate blank and then click on the submit button. Your
password is the first eight characters
of your Yahoo id. If the new id was the same as the first eight
characters of another member then you were assigned a different id.
You were notified of the new id via an email sent to the addy you have
listed on the Yahoo membership list. It is strongly recommended that
once things are working that you change your password using the
prompts on the log in page.