Follow these steps:
To add you to an existing account, TRES sends you an invitation email message:
Click Accept Invitation.
The following dialog is displayed.
2. Do not provide user name and password in this dialog.
3. Next to Already have an account? click Log in.
4. Another login window appears.
4. Enter the user name and password you have used up to now.
5. Click Continue to access your TRES account.