[CentOS] DNS trouble (little, but i need some help)

HI , i have a DNS trouble , wish you could help me, maybe it's a bit
mistake of mine, but i don't know what could it be, i'm trying
to configure phpnuke, and i want the URL http://portal.misitio.cl
points to /var/www/nuke, that's ok with apache virtualhost, but in DNS
, i'm trying to do from anoother server

$host portal.misitio.cl
Host portal.misitio.cl not found: 3(NXDOMAIN)

here its my 2 file 227.77.145.in-addr.arpa.hosts  and
/var/named/misitio.cl.hosts

hope you could help me

Thanks


/var/named/227.77.145.in-addr.arpa.hosts

227.77.145.in-addr.arpa.        IN      SOA     ns.misitio.cl.
webmaster.misitio.cl. (
                        1162314675
                        10800
                        3600
                        604800
                        38400 )
227.77.145.in-addr.arpa.        IN      NS      ns.misitio.cl.
235.227.77.145.in-addr.arpa.    IN      PTR     ns.misitio.cl.
235.227.77.145.in-addr.arpa.    IN      PTR     www.misitio.cl.
235.227.77.145.in-addr.arpa.    IN      PTR     mail.misitio.cl.
235.227.77.145.in-addr.arpa.    IN      PTR     portal.misitio.cl.
235.227.77.145.in-addr.arpa.    IN      PTR     misitio.cl.


/var/named/misitio.cl.hosts

misitio.cl.  IN      SOA     ns.misitio.cl. webmaster.misitio.cl. (
                        1162314305
                        10800
                        3600
                        604800
                        38400 )
misitio.cl.  IN      NS      ns.misitio.cl.
ns.misitio.cl.       IN      A       145.77.227.235
mail.misitio.cl.     IN      A       145.77.227.235
www.misitio.cl.      IN      A       145.77.227.235
portal.misitio.cl.   IN      A       145.77.227.235
misitio.cl.  IN      A       145.77.227.235
misitio.cl.  IN      MX      10 mail.misitio.cl.