FTP chainloading a menu.ipxe

[alhyene]

Hello Everybody, it's my first post here.

I'm in trouble chainloading a menu.ipxe by FTP
I've tried with and without EMBEDing script in ipxe.lkrn (compiled by hand or rom-o-matic with I think good options)

#!ipxe
dhcp
chain http://ftp.192.168.0.254/Disque%20dur/menu.ipxe

The script load then suddenly hang.
I must say I successfully boot a Linux one (kernel + initrd) by FTP.

ps: I must use FTP cause my Internet box have just a FTP inside.

Best regards.