Problems with HP dc5000 and d530 CMT and Ghost Solution Suite

I work for a school district.  We use Symantec Ghost Solution Suite 2.0 to image all of our machines over the summer.  I have done it for several years with no problems.  Recently, I had some HP dc5000 and d530 cmt machines donated.  They are giving me trouble.  Here is how I usually ghost machines. (it has worked with about 20 different models with not issues).

I start Ghost session on my laptop.  I boot each machine from a Ghost Boot CD with universal drivers.  I then go to the client and start a "Multicast" ghost session.  I connect as many clients as I need, and start the ghost session.  This does not work on the HP machines.  They never stop saying "Waiting for Ghost Cast Session to Start".  The Ghost server tries to start the session, but never gets going.  If I select "Unicast" on the client, it will work.  Anybody know why I can't Multicast these machines?  This is driving me crazy!

I have tried different network switches, different boot disks.  I have even gone into the BIOS and made some changes to IRQ addresses and turned off the SATA support on the d530s (it has both IDE and SATA connections on motherboards).  It doesn't matter if I use and IDE of SATA drive.  Same result.  HELP!
andysealsAsked:
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emilgasCommented:
So in a unicast mode they work but when you try multiple PCs in a Multicast it doesn't?
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andysealsAuthor Commented:
That is correct.  Multicast won't work for just one pc, either.
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andysealsAuthor Commented:
Didn't get a solution to this issue.  Going to close it out.
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andysealsAuthor Commented:
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