Radius eap- tls certificate failure

I hope someone can help me out. I have an Ubuntu with Free Radius server where i am authenticating wired camera's with eap tls. I have made an CA, server and client certificate and it works fine, but only on one camera, when i try to do the same to the second camera ( same brand, model and fw) i get an handshake failure. Any idea what the problem can be? Hope to hear from you, if you need any information let me know Thanks already. Dominique