Almost same mac address not get discoverd by the Ghost console

Hi folks,

This is the first time ever, that i post a cry for help about the ghost console.

A few days ago i got a shipment of new HP 6300 SFF computers.Yesterday i started to place a image on a batch of 20 computers with 3com PXE boot + multicast. All went fine!

Al 20 machines got the ghost client installed (was intergraded in the base image) and can be found/discovered inside the ghost console, after image restore.

Except for 1..

What i see in my DHCP lease on the server, an almost same mac address.... really only one digit is different..

Base Question:

How can i let the Ghost console discover both machines with the almost indentical mac address?!

Thanks in advance,