Hi, Grow01.
To access Silver Server, you will need to merge your account in the Dashboard. You will need to merge your past progress into Silver by choosing one of the merging options, and then resetting your password. You should then be able to log in Silver.
However, if you happen to be in doubt, an appropriate Staff member will come in your aid and provide you with the info and correct links so you can merge correctly, as I am only a Discord Moderator. They will help you in anything you may need :) I hope this helped a bit!