problem with boot.ipxe

Hi,
I try to use the iPXE, with the ISO.
I prepared my IIS folder with all the necessary.
When I try to boot with the file boot.ipxe, the process will hang...
Trying to rename with .php extension...

Script :

#!ipxe

kernel http://gss/win7/wimboot
initrd http://gss/win7/boot/bcd BCD
initrd http://gss/win7/boot/boot.sdi boot.sdi
initrd http://gss/win7/sources/boot.wim boot.wim
boot

But if I type each line in the prompt, the wim boots properly...

If you can help me.

Thanks a lot.
See Attachment below

Greg

Ipxe