How to boot an X86 client from an ISC-DHCP for Custom JumpStart?

Hello,
I once succeed in using JumpStart on the SPARC platform, OK.

I'm recently trying to use the same knowledge in X86 but the booting is failing with the following message:

PXE-E74: Bad or missing PXE menu and/or prompt information

I'm using the following command to create the install client:

# export SERVER=js-01.company.com
# cd /install/Solaris_10/Tools
# ./add_install_client -d -s $SERVER:/install -c $SERVER:/jumpstart -p $SERVER:/sysidcfg `uname -i` `uname -m`
enabling tftp in /etc/inetd.conf
Converting /etc/inetd.conf
enabling network/tftp/udp6 service
copying boot file to /tftpboot/pxegrub.I86PC.Solaris_10-1