DNS Server Failure ao rodar script no Mikrotik

Senhores, bom dia.

Estou tentando executar um script no Mikrotik para atualizar meu DynDNS, mas quando rodo ele a partir do terminal eu recebo o seguinte erro: failure: dns server failure. Uso um RB750 v5.25. Este erro está impedindo que eu mantenha meu host atualizado.

Segue meu script:

Código :

:local ddnsuser "meusuario"
:local ddnspass "minhasenha"
:local theinterface "pppoe-iface2"
:local ddnshost "meu.hostname.dyndns"    
:local ipddns [:resolve $ddnshost];
:local ipfresh [ /ip address get [/ip address find interface=$theinterface ] address ]
:if ([ :typeof $ipfresh ] = nil ) do={
   :log info ("DynDNS: No ip address on $theinterface .")
} else={
   :for i from=( [:len $ipfresh] - 1) to=0 do={
      :if ( [:pick $ipfresh $i] = "/") do={
    :set ipfresh [:pick $ipfresh 0 $i];
      }
}
:if ($ipddns != $ipfresh) do={
    :log info ("DynDNS: IP-DynDNS = $ipddns")
    :log info ("DynDNS: IP-Fresh = $ipfresh")
   :log info "DynDNS: Update IP needed, Sending UPDATE...!"
   :local str "/nic/update?hostname=$ddnshost&myip=$ipfresh&wildcard=NOCHG&mx=NOCHG&backmx=NOCHG"
   /tool fetch address=members.dyndns.org src-path=$str mode=http user=$ddnsuser \
         password=$ddnspass dst-path=("/DynDNS.".$ddnshost)
    :delay 1
    :local str [/file find name="DynDNS.$ddnshost"];
    /file remove $str
    :global ipddns $ipfresh
  :log info "DynDNS: IP updated to $ipfresh!"
    } else={
     :log info "DynDNS: dont need changes";
    }
}

Obrigado e bom fds!