Add these lines:
service tftp { socket_type = dgram protocol = udp wait = yes user = root server = /usr/sbin/in.tftpd server_args = /tftpboot disable = no per_source = 100 2 flags = IPv4}
service tftp
{
socket_type = dgram
protocol = udp
wait = yes
user = root
server = /usr/sbin/in.tftpd
server_args = /tftpboot
disable = no
per_source = 100 2
flags = IPv4
}
# /etc/init.d/xinetd restart
OR
# service xinetd restart