F8 PXE Menu Issue

Hello.

We are running DS/CMS 7.1 and are having some issues wih the F8 PXE Menu.

When a client boots at our main site (from our NS) they get the correct list of boot images at the F8 menu, however clients booting from our three remote offices via site servers do not recieve the same list of boot images.

We cleared down our list of boot images so that there are only two however they still dont show in the menu despite being recreated.
The images are in the SBS folder on the site servers and when recreated I can see Bootwiz running so the issue seems to be with the menu.

Any suggestions?

Thanks.