PXEPreZero Invalid PXE Server list format

Hello,

I have a problem with Symantec Ghost Solution suite 3.0 and the altiris PXE (On Windows Server 2012 R2 x64).

When my Client computer start network boot, it says :

PXE PreZero: Invalid PXE Server list format
PXE-MOF: Exiting Intel Boot Agent

1) My Server GSS 3.0 is on the same subnet than my DHCP Server.
2) My Clients are on a different subnet than my DHCP and PXE server
3) My DHCP Server has Option 66 and 67 with the correct configuration -> My Client access to the Bstrap.0 (checked with logs on GSS 3.0)
4) The TFTP Session is correct (check with WireShark)
5) I have regenerate the winPE boot image

Now I need help, any solutions please ?

PellatonR.