SSPI SEC_E_WRONG_PRINCIPAL with bad SPN

With SSPI, I am trying to connect my win7 to a win2008-r2 domain controller.

Win7 connects to DC without any problem.

So, on the domain controller, I create a new SPN

C:\> setspn -A test/value vmlab-wdc01

      

        
        
        
      

    

I am checking a new entry

 C:\setspn -l vmlab-wdc01
 Registered ServicePrincipalNames for CN=VMLAB-WDC01,OU=Domain Controllers,DC=vmlab,DC=local:
         test/value
         ldap/vmlab-wdc01.vmlab.local/ForestDnsZones.vmlab.local
         ldap/vmlab-wdc01.vmlab.local/DomainDnsZones.vmlab.local
         TERMSRV/VMLAB-WDC01
         TERMSRV/vmlab-wdc01.vmlab.local
         Dfsr-12F9A27C-BF97-4787-9364-D31B6C55EB04/vmlab-wdc01.vmlab.local
         DNS/vmlab-wdc01.vmlab.local
         GC/vmlab-wdc01.vmlab.local/vmlab.local
         HOST/vmlab-wdc01.vmlab.local/VMLAB
         HOST/vmlab-wdc01.vmlab.local
         ldap/vmlab-wdc01.vmlab.local/VMLAB
         ldap/VMLAB-WDC01
         ldap/vmlab-wdc01.vmlab.local
         ldap/vmlab-wdc01.vmlab.local/vmlab.local

      

        
        
        
      

    

Now, from the client side, I am calling InitializeSecurityContext (hCred, NULL, "test / value" ...

And i get SEC_E_WRONG_PRINCIPAL

I tried ldap / vmlab-wdc01.vmlab.local, same results If I just tried Administrator it works !!

what's wrong...