Register Portal error: The current user account is not recognized by Forefront Identity Manager. Please contact your help desk or system administrator. (Error 3003)

The current user account is not recognized by Forefront Identity Manager. Please contact your help desk or system administrator. (Error 3003) '

after that i went to this link:

http://social.technet.microsoft.com/wiki/contents/articles/20213.troubleshooting-fim-sspr-error-3003-the-current-user-account-is-not-recognized-by-forefront-identity-manager-please-contact-your-help-desk-or-system-administrator.aspx

that expert says make sure samaccountname, domain exist in portal. i can see the user is in portal and active directory. do i need to have both inbound/outbound sync rule for ad to fim? because at the moment, there is outbound rule from fim to AD. i suspect that portal does not have sid of the user in active directory and the reason is there is no inbound rule from AD to fim portal.

any ideas?