ipxe With Http Boot Configuration

[shahd00]

Hello.
I am experiencing difficulty with using wimboot with iPXE to boot Windows PE via HTTP.

I have 2 machines.

Machine 1 is a laptop with the following installed:
Windows 7
IIS (default settings)
Tftpd32 running dhcp server only
A directory named "/inetpub/wwwroot/win7/" with the following files:
bootmgr
BCD
boot.sdi
boot.wim
boot.ipxe
wimboot

Machine 2 is a Desktop set up for PXE booting. I am using an image of iPXE on CD to boot from.

On machine 2, I press "ctrl+b" to get the prompt and then enter the commands:
dhcp
"boot http://my.web.server/<path-to-boot.ip...;boot.ipxe" (without quotes)

I followed the steps in http://ipxe.org/howto/winpe and am getting a "Connection timed out" message after about 10 seconds, after I type:
"boot http://my.web.server/inetpub/wwwroot/win7/boot.ipxe"

Am I typing in the 2nd command correctly ?

Does the "Timed Out" message mean the script file "boot.ipxe" was partially read before the time out OR that the script file "boot.ipxe" could not be accessed ?

Thanks