802.1x EAP-TLS

Hi!

I have a Yealink T-19 (firmware version is 31.72.0.75).

I try to configure 802.1x EAP-TLS via web interface.

802.1x mode - EAP-TLS
Identity - Phone
CA certificate - CA root certificate (that was generic on my SSL)
Device Certificate - user certificate

But when I connected it to the switch Wireshark show that there is no EAPOL-Start messages.

What is a problem?