Hi, I'm trying to configure an E66 with WPA2 EAP-TLS with certificates against a Microsoft IAS Radius , but I always obtain the same error in the server event viewer

denied accesss
Authentication-Type = EAP
EAP-Type = Smart Card or other certificate
Reason-Code = 16
Reason = Authentication was not successful because an unknown user name or incorrect password was used.

I'm using the same certificates I use with notebooks
Has anybody tried E66 or similiar with EAP-TLS?
Any experiences?
I'm using EAP-TLS because I think it is the most secure protocol, do you think it can be enough secure some other protocol?
Thanks