[OSD] - SCCM - Stuck on retrieving policy

Hi,

On my new M630 with NIC 10GB (Broadcom BCM57810 NetXtreme II 10 GigE), after PXE boot I am stuck on Retrieving Policy step.

• SCCM 2012 R2 infrastructure 
• Using Unknow computer support
• OSD works with other servers.
• I get IP adresse.
• I used DTK 5.1 to create WinPe image.
• I am stuck on Retrieving Policy... no error message.
• In smstslog stuck after:
  
  • Using unknown machine GUID: 674bec24-eaaa-4367-a716-e22203277847 TSPxe 8/6/2015 9:54:23 AM 2132 (0x0854)
    GetSystemEnclosureChassisInfo: IsFixed=FALSE, IsLaptop=FALSE TSPxe 8/6/2015 9:54:23 AM 2132 (0x0854)
• On a working system the next line is:
  • Hash computed from CSP: Microsoft Enhanced RSA and AES Cryptographic Provider, AlgID: 32772, HashSize: 20

Does anyone has an idea ? If I provision my server with mac adress it works fine.. because TS manager doesnt go through this step...

Thx !