To reset the passphrase, choose "e-rx admin" from the admin menu. This will take you to a screen with your EPCS information. From here, click the button that says "open EPCS admin console." On the right side of this is a link to reset your passphrase.
Once you click on that link, you need to enter your NPI, the e-mail you have registered with EPCS, the token serial number and the one-time PIN from the token.
If this does not work, please try entering the token serial number with lower-case letters.