The name coteseg.sslblindado.com doesn’t resolve to any IP, so that just isn’t going to work.
segseguro.sslblindado.com does return an IP (187.17.111.96), and it does work with SSL https://segseguro.sslblindado.com, but, it’s using a GeoTrust certificate. My guess (for coteseg.com) would be the webserver isn’t pointing to the correct certificate for coteseg.com. Can you post the relevant lines of the config?