NPS Error 4625 + NPS Error 6273 (Code Reason 295) Autenticating Computers for Wireless access

We have a CA Root(Offline) and a Subordinate CA (Online) which gives certificates for computers via GPO. Everything works well in our test environment (DC Active Directory,Microsoft NPS RADIUS, MS_ROOT_CA and MS_SUBCA_Enterprise(Everything runing on Windows 2008 R2)).

Now we have problems in production environment. Aparently everything is correctly configured as in test environment(Windows 2008 R2 as well).

We a client computer tries to connect to the wireless network, we get these two error events in the radius Server:

NPS Error id 4625

NPS Error id 6273 Code Reason 295 "A certification chain processed correctly, but one of the CA certificates is not trusted by the policy provider"

Everything runs in the same domain.

Any idea?

Thanks