Client-side authentication: unknown CA error

I am trying to run the following command: [root@localhost certs]# openssl s_client -connect localhost:7043 -cert /opt/openssl-1.0.0a/ssl/ certwork_client/client.crt -key /opt/openssl-1.0.0a/ssl/certwork_client/client.key -CAfile /opt/openssl-1.0.0a/ssl/certwork/ca.crt -showcerts -state -verify 2 v

alert read:fatal:unknown CA

I am trying to run the following command: [root@localhost certs]# openssl s_client -connect localhost:7043 -cert /opt/openssl-1.0.0a/ssl/certwork_client/client.crt -key /opt/openssl-1.0.0a/ssl/certwork_client/client.key -CAfile /opt/openssl-1.0.0a/ssl/certwork/ca.crt -showcerts -state -verify 2 ve