sign in lync client doesn't work

hello all, 

I have a probleme maybe you can help me to fix it. I'm working on lync client part and i can't sign in.

i create all A and SRV records , all services are running, my client pc is join to the domaine(ping work)

admin:172.16.3.66 host A

meet:172.16.3.66 host A

dialin:172.16.3.66 host A

lyncServ:172.16.3.66 host A

lyncDiscoverInternal: 172.16.3.66 hostA

sip Alias CNAM lyncServ.myproject.local

_sipinternaltls : protocol _tcp , port 5061 host offering services:lyncServ.myproject.local

please help, did i miss somethin' ?