Its not our board so we cannot help you with issues you may have with it. You will have to contact the admin team of the board reader site, but most likely you will not receive any help as giving out email addresses to users you cannot verify is a bad idea. Just create a new account and move on.
Actually he will need to contact the NVIDIA forum admins as that's where the thread originated. BoardReader is one of those pesky scraper sites that fills the Internet with duplicated content.