Praveen,
Have you also assigned security to the Universe and connection? It seems
that the user requires to view on demand on both.
Also, have you modified the security for Everyone group? Usually, these
problems appear after denying access to that group. Every user belongs to that
group and it's affected.
I presume you may have given specific rights to the USR2 and this always
takes precedence over group security.
Regards,
Julian