升级openvpn 2.1后 客户端配置文件报错，是static key方式，需要修改吗？

wlmmc

dev tap0
secret key.txt
http-proxy-retry
http-proxy 10.0.0.172 80
proto tcp-client
remote wlmmc.3322.org 443
route-gateway 192.168.1.1
redirect-gateway
keepalive 10 60
resolv-retry infinite
nobind
persist-key
persist-tun
cipher BF-CBC
comp-lzo
verb 3
float

wlmmc

报错：

Options error: Parameter ca_file can only be specified in TLS-mode, i.e. where -
-tls-server or --tls-client is also specified.
Use --help for more information.
Press any key to continue...

wlmmc

顶顶顶。。。。。