openvpn and vsftp

I having weird problem with access vsftp through openvpn tunnel . I don’t have problem login the ftp server but when I using LS , it hang there.

I turn off the firewall but the problem still the same

any idea how to solve this?

it working fine if I access it directly (not through vpn tunnel).

this is the setting I use on openvpn server am I missing anything here

local 192.168.1.250
port 1194
proto udp
dev tun
ca /etc/openvpn/easy-rsa/2.0/keys/ca.crt
cert /etc/openvpn/easy-rsa/2.0/keys/server.crt
key /etc/openvpn/easy-rsa/2.0/keys/server.key # This file should be kept secret
dh /etc/openvpn/easy-rsa/2.0/keys/dh1024.pem
client-to-client
server 10.8.0.0 255.255.255.0
ifconfig-pool-persist ipp.txt
keepalive 10 120
cipher AES-128-CBC # AES
plugin /usr/lib64/openvpn/plugin/lib/openvpn-auth-pam.so login
username-as-common-name
comp-lzo
user nobody
group nobody
persist-key
persist-tun
push “route 192.168.1.0 255.255.255.0”
status openvpn-status.log
script-security 3
verb 3

somebody Help !!!