This is the error log

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Thu May 2 01:05:14 2013 218.86.195.206:28387 TLS: Initial packet from [AF_INET]218.86.195.206:28387, sid=86eac8aa 05140769

Thu May 2 01:06:14 2013 218.86.195.206:28280 TLS: Initial packet from [AF_INET]218.86.195.206:28280, sid=aa44605d 2b4edba3

Thu May 2 01:06:14 2013 218.86.195.206:28387 TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity)

Thu May 2 01:06:14 2013 218.86.195.206:28387 TLS Error: TLS handshake failed

Thu May 2 01:06:14 2013 218.86.195.206:28387 SIGUSR1[soft,tls-error] received, client-instance restarting

–--

and this is my openvpn config

port 11994

proto udp

dev tun

SSL/TLS

ca /etc/openvpn/ca.crt

cert /etc/openvpn/zfish.crt

key /etc/openvpn/zfish.key

tls-auth /etc/openvpn/ta.key 0

Diffie hellman parameters

dh /etc/openvpn/dh2048.pem

script-security 2

keepalive 10 120

comp-lzo

VPN subnet

server 10.8.0.0 255.255.255.0

ifconfig-pool-persist /etc/openvpn/ipp.txt

persist-key

persist-tun

status /var/log/openvpn-status.log

verb 3

push "redirect-gateway def1"

push "dhcp-option DNS 10.8.0.1"

push "dhcp-option DNS 8.8.8.8"

push "dhcp-option DNS 4.4.4.4"

push "dhcp-option DNS 208.67.222.222"

and this is my andriod client config

!/bin/sh

client

dev tun

proto udp

remote 106.187.49.162 11994

nobind

persist-key

persist-tun

ca ca.crt

cert MX2.crt

key MX2.key

tls-auth ta.key 1

auth-user-pass

verb 3

Please help me, Thanks very much!