Error de TFTP

Tengo un error de tftp que no acabo de entender
Al intentar conectarse el cliente( protocolo PXE) con el servidor obtengo
los mensajes:
PXE-02: Forbiden directory
PXE-E3C: Tftp Error - Access Violations
El fitxero dhcpd.conf és.
# dhcpd.conf


ddns-update-style             ad-hoc;


option subnet-mask            255.255.255.0;
option broadcast-address      192.168.1.255;
option routers                192.168.1.23;
option domain-name-servers    192.168.1.23;
option domain-name            "iesbm";   # You really should fix this
option option-128 code 128 = string;
option option-129 code 129 = text;




get-lease-hostnames           true;


next-server                   192.168.1.23;
option root-path              "192.168.1.23:/opt/ltsp/i386";


subnet 192.168.1.0 netmask 255.255.255.0 {
    range   192.168.1.2   192.168.1.7;
    filename "/lts/2.6.17.8-ltsp-1/pxelinux.0";
}
# y comentarios hasta el final

el fitxero tftp dentro de /etc/xinetd.d/ és
# default: off
# description: tftp service is provided primarily for booting or when a \
#       router need an upgrade. Most sites run this only on machines acting
as
#       "boot servers".
service tftp
{
        socket_type             = dgram
        protocol                = udp
        wait                    = yes
        user                    = root
        server                  = /usr/sbin/in.tftpd
        server_args             = /tftpboot
        disable                 = no
}
y en el directorio  /tftboot//lts/2.6.17.8-ltsp-1/ tengo:
-rw-rw-r--  1 root root 1594530 2006-08-12 04:29 bzImage-2.6.17.8-ltsp-1
-rw-rw-r--  1 root root 1273978 2006-08-12 04:29 initramfs.gz
-rw-rw-r--  1 root root   11826 2006-08-12 04:29 pxelinux.0
drwxrwxr-x  2 root root    4096 2006-08-12 04:29 pxelinux.cfg
Si como parece tftp actua con permisos de root, no entiendo que no pueda
acceder
al fichero pxelinux.0

Esteve