FreeBSD boot stops

[amine tay]

Hi every one,
When i'm trying to pxe boot FreeBSD 9.1, the pxeboot display the lines
bellow :  :
Building the boot loader arguments
Looking up /BOOT/LOADER... Found
Relocating the loader and the BTX
Starting the BTX loader

BTX loader 1.00 BTX version is 1.02
Consoles: internal video/keyboard
BIOS CD is cd0
BIOS drive C: is disk0
BIOS drive D: is disk1
BIOS 636kB/261056kB available memory

FreeBSD/i386 bootstrap loader, Revision 1.1

But it stops here and I'm not getting the :

pxe open  : server addr

or
Loading /boot/defaults/loader.conf
/boot/kernel/kernel text=0x64daa0 data=0xa4e80+0xa9e40
syms=[0x4+0x6cac0+0x4+0x88e9d]
\

Any help ?

Thank you.