Failed SSL Handshake Error

I'm connecting to a host that requires a client certificate. Is the below failure rejecting my client certificate or does it mean chilkat is rejecting the remote servers certificate?

Thanks!

ChilkatLog:
  GetServerSslCert:
    DllDate: Dec 30 2015
    ChilkatVersion: 9.5.0.55
    UnlockPrefix: NTHttp
    Architecture: Little Endian; 64-bit
    Language: Linux Perl
    VerboseLogging: 0
    domain: mysite.com
    port: 443
    socket2Connect:
      connect2:
        connectImplicitSsl:
          clientHandshake:
            clientHandshake2:
              readHandshakeMessages:
                processAlert:
                  TlsAlert:
                    level: fatal
                    descrip: unknown certificate authority
                  --TlsAlert
                --processAlert
                Aborting handshake because of fatal alert.
              --readHandshakeMessages
            --clientHandshake2
          --clientHandshake
          Client handshake failed. (3)
        --connectImplicitSsl
        ConnectFailReason: 109
      --connect2
    --socket2Connect
    Failed.
  --GetServerSslCert
--ChilkatLog