thanx for you reply, but as i said certificates are ok. Please see this log
[tls] --> BUF-Name = wi-tribe Pakistan Certification Authority
[tls] --> subject = /C=PK/ST=Fedral Capital/L=Islamabad/O=wi-tribe Pakistan limited/OU=Network Operations/CN=wi-tribe Pakistan Certification Authority/emailAddress=
pkwinoc@pk.wi-tribe.com
[tls] --> issuer = /C=PK/ST=Fedral Capital/L=Islamabad/O=wi-tribe Pakistan limited/OU=Network Operations/CN=wi-tribe Pakistan Certification Authority/emailAddress=
pkwinoc@pk.wi-tribe.com
[tls] --> verify return:1
--> verify error:num=10:certificate has expired
[tls] >>> TLS 1.0 Alert [length 0002], fatal certificate_expired
TLS Alert write:fatal:certificate expired
TLS_accept: error in SSLv3 read client certificate B
rlm_eap: SSL error error:140890B2:SSL routines:SSL3_GET_CLIENT_CERTIFICATE:no certificate returned