pxe booting problem

Hi,
I tried to install debian via PXE.
following the doc, I install netboot.tar.gz which contains pxe file.
I configured the dhcpd.conf   here is relevant part :

host 00016CB3066E{   #   MAC
    hardware ethernet 00:01:6C:B3:06:6E;
    fixed-address    172.19.6.224;
    server-name    debian225;
    next-server    debian225;
    filename "/var/lib/tftpboot/pxelinux.0";
}

I decompressed netboot.tar in /var/lib/tftpboot ,
I installed tftpd-hpa
first problem:
the file contains /etc/default/tftpd-hpa

RUN_DAEMON="no"
OPTIONS="-l -s /var/lib/tftpboot"

so the standalone tftpd-hpa is disabled, ??
While the file /etc/inetd.conf contains the good line
tftp           dgram   udp     wait    root /usr/sbin/in.tftpd /usr/sbin/in.tftpd -s /var/lib/tftpboot

When I boot a remote machine, I get correct address from the dhcp,

but the error is : file not found tftp error   ?????
            why I declared pxelinux0 in the /var/lib/tftpboot

question: must I run a standlone /tftpd-hpa or thru inetd, where I have to declare pxelinux0    for the connection

thanks a lot
bela