T26P and firmware 6.70.0.110 : does not retrieve called extension name from Asterisk

[dimangelid]

Hello,
I have a T26P phone and in general i'm very satisfied from it. I have a problem with the .70 series firmware... Before the release of 6.70.90 firmware i had the 6.61.0.83 . Whenever i called another extension inside my Asterisk PBX (for example my extension is 200 and i call the extension 201 which has the name John), the T26P displayed the extension name after pressing the send button and the other extension started ringing. The T26P retrieved the extension name from my Asterisk PBX. When i installed the 6.70.90 version, that function stopped working. I just tried the 6.70.110 version and it has the same problem. At the same time my Linksys SPA941 does not have that problem. I have tested calling both IAX2 and SIP extensions without any difference. My Asterisk version is 11.1.0, the FreePBX version is 2.11 beta1 and the whole setup is running at Mageia 2 64bit. Can anyone help me?