Sophos SSL VPN Client ain't connecting

Guys,

I am getting the following error message while try connecting via Sophos SSL VPN client. HTML VPN is working fine. The error log is:

Thu Jan 28 08:47:51 2016 OpenVPN 2.3.0 i686-w64-mingw32 [SSL (OpenSSL)] [LZO] [IPv6] built on Mar 23 2015
Enter Management Password:
Thu Jan 28 08:47:51 2016 MANAGEMENT: TCP Socket listening on [AF_INET]127.0.0.1:25341
Thu Jan 28 08:47:51 2016 Need hold release from management interface, waiting...
Thu Jan 28 08:47:52 2016 MANAGEMENT: Client connected from [AF_INET]127.0.0.1:25341
Thu Jan 28 08:47:52 2016 MANAGEMENT: CMD 'state on'
Thu Jan 28 08:47:52 2016 MANAGEMENT: CMD 'log all on'
Thu Jan 28 08:47:52 2016 MANAGEMENT: CMD 'hold off'
Thu Jan 28 08:47:52 2016 MANAGEMENT: CMD 'hold release'
Thu Jan 28 08:48:04 2016 MANAGEMENT: CMD 'username "Auth" "ipsec"'
Thu Jan 28 08:48:04 2016 MANAGEMENT: CMD 'password [...]'
Thu Jan 28 08:48:04 2016 WARNING: Make sure you understand the semantics of --tls-remote before using it (see the man page).
Thu Jan 28 08:48:04 2016 NOTE: OpenVPN 2.1 requires '--script-security 2' or higher to call user-defined scripts or executables
Thu Jan 28 08:48:04 2016 Socket Buffers: R=[65536->65536] S=[65536->65536]
Thu Jan 28 08:48:04 2016 Attempting to establish TCP connection with [AF_INET]203.6.245.1:443 [nonblock]
Thu Jan 28 08:48:04 2016 MANAGEMENT: >STATE:1453931284,TCP_CONNECT,,,
Thu Jan 28 08:48:05 2016 TCP connection established with [AF_INET]203.6.245.1:443
Thu Jan 28 08:48:05 2016 TCPv4_CLIENT link local: [undef]
Thu Jan 28 08:48:05 2016 TCPv4_CLIENT link remote: [AF_INET]203.6.245.1:443
Thu Jan 28 08:48:05 2016 MANAGEMENT: >STATE:1453931285,WAIT,,,
Thu Jan 28 08:48:05 2016 MANAGEMENT: >STATE:1453931285,AUTH,,,
Thu Jan 28 08:48:05 2016 TLS: Initial packet from [AF_INET]203.6.245.1:443, sid=8ae1c2ea 1683caa3
Thu Jan 28 08:48:05 2016 WARNING: this configuration may cache passwords in memory -- use the auth-nocache option to prevent this
Thu Jan 28 08:48:05 2016 VERIFY ERROR: depth=0, error=unable to get local issuer certificate: C=au, L=Clayton, O=Kent Relocation Group, CN=kent-utm-1.kentmoving.com, emailAddress=CraigP@KentRelocationGroup.com
Thu Jan 28 08:48:05 2016 TLS_ERROR: BIO read tls_read_plaintext error: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
Thu Jan 28 08:48:05 2016 TLS Error: TLS object -> incoming plaintext read error
Thu Jan 28 08:48:05 2016 TLS Error: TLS handshake failed
Thu Jan 28 08:48:05 2016 Fatal TLS error (check_tls_errors_co), restarting
Thu Jan 28 08:48:05 2016 SIGUSR1[soft,tls-error] received, process restarting
Thu Jan 28 08:48:05 2016 MANAGEMENT: >STATE:1453931285,RECONNECTING,tls-error,,
Thu Jan 28 08:48:05 2016 Restart pause, 5 second(s)

Appreciate your help in cracking this issue out.