netboot problem??? (again)

[=?gb2312?q?David=20wu?= <wq2651wq@yahoo.com.cn>]

hello all,
when i boot an i386pc by netboot,an error happened.
All display on the i386pc as below:
...
Boot-Rom v0.8.1
Bootp:Sending request:.....ok
local ip:192.168.91.21
server ip:192.168.91.123
File name:
TFTP:Error 4:Illegal TFTP operation
and then halt.

My host is redhat 7.2 and set as below:
/etc/bootptab
wq:hd=/tftpboot/:vm=auto:ip=192.168.91.21:ht=ethernet:ha=0060971B8AF3:bf=hello.bt
/etc/Xinetd.d/tftp
service tftp
{
socket_type = dgram
protocol = udp
wait = yes
user =root
server =/usr/sbin/in.tftpd
server_args= -s /tftpboot
disable = no
per_source = 11
cps = 100 2
}

on my linux exit :/tftpboot/hello.bt
i have done command: rpm -ivh
tftp-server-0.28-2.i386.rpm

thanks 
                    David wu


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