Not able to connect to SSL vpn using Gentoo

[manu_leo]

Hi Experts, i am not able to connect to my firewall in London using Gentoo Laptop. From all other laptops -Windows, Ubuntu, ,MAC I am able to connect without any issues. When I check the vpn logs on my machine, I see the below logs coming up continuously every time I am trying to connect :-

07/22/2014 22:46:25.053 [connect info 7549] User: "s11user"
07/22/2014 22:46:25.053 [connect info 7549] Domain: "clients"
07/22/2014 22:46:25.053 [connect info 7549] Server: "ssl.guavatech.com:443"
07/22/2014 22:46:25.115 [general notice 7549] Connecting to ssl.guavatech.com:443...
07/22/2014 22:46:26.121 [connect warn 7549] SSL_get_peer_certificate: X509_V_ERR_INVALID_CA
07/22/2014 22:46:26.121 [general notice 7549] Connected.
07/22/2014 22:46:26.121 [general notice 7549] Logging in...
07/22/2014 22:46:27.955 [general notice 7549] Login successful.
07/22/2014 22:46:29.340 [epc info 7549] Server don't support EPC check. Just pass EPC check
07/22/2014 22:46:31.974 [general notice 7549] SSL Connection is ready
07/22/2014 22:46:32.979 [general info 7549] Using new PPP frame encoding mechanism
07/22/2014 22:46:32.979 [general info 7549] Using PPP async mode (chosen by server)
07/22/2014 22:46:32.979 [general info 7549] Connecting tunnel...
07/22/2014 22:46:32.987 [traffic error 7549] Error reading from pppd: 5 Input/output error
07/22/2014 22:46:32.987 [general notice 7549] SSL VPN logging out...
07/22/2014 22:46:34.480 [general notice 7549] SSL VPN connection is terminated.
07/22/2014 22:46:34.480 [config info 7549] Loading saved profiles...
07/22/2014 22:46:34.480 [config info 7549] Done.
07/22/2014 22:46:34.482 [gui info 7549] NetExtender disconnected

Need you help in getting this fixed.

Appreciate all your help in advance.

[manu_leo]

Just to add, I am using Sonicwall Net-extender VPN Client to connect securely to my firewall via Internet.