Clients cannot access LAN behind OpenVPN Server

I configured my EdgeRouter X as an OpenVPN Server.

Clients which are connected through this VPN Tunnel are able to access the internet and the router webinterface. The problem is they´re not able to ping any clients in the LAN of the Ubiquiti Router.

Here is some information about my network:

IP of my router and OpenVPN Server: 192.168.0.254

LAN Subnet: 192.168.0.0/24

Client i´d like to ping/connect: 192.168.0.52

OpenVPN client subnet: 192.168.70.0

I configured the OpenVPN server via Vyatta command line. Here is my config:

admin@SRV01# show
 description "OpenVPN server"
 encryption aes256
 hash sha256
 mode server
 openvpn-option "--port 1194"
 openvpn-option --tls-server
 openvpn-option "--comp-lzo yes"
 openvpn-option --persist-key
 openvpn-option --persist-tun
 openvpn-option "--keepalive 10 120"
 openvpn-option "--user nobody"
 openvpn-option "--group nogroup"
 server {
     name-server 192.168.0.254
     push-route 192.168.0.0/24
     subnet 192.168.70.0/24
 }
 tls {
     ca-cert-file /config/auth/cacert.pem
     cert-file /config/auth/host.pem
     dh-file /config/auth/dh2048.pem
     key-file /config/auth/host-decrypted.key
 }

running "show ip route" shows this:

IP Route Table for VRF "default"
S    *> 0.0.0.0/0 [210/0] via 172.16.1.1, eth0
C    *> 0.0.0.0/24 is directly connected, vtun0
C    *> 127.0.0.0/8 is directly connected, lo
C    *> 172.16.0.0/16 is directly connected, eth0
C    *> 192.168.0.0/24 is directly connected, switch0
C    *> 192.168.70.0/24 is directly connected, vtun0

and here is my client config:

client
dev tun
proto udp
remote MYDOMAIN 1194
cipher AES-256-CBC
auth SHA256
resolv-retry infinite
redirect-gateway def1
nobind
comp-lzo yes
persist-key
persist-tun
user nobody
group nogroup
verb 3
pull --route
ca cacert.pem
cert client_tl.pem
key client_tl.key

I already tried to ping any other clients which are reachable and pingable normaly in LAN. Does anybody have an idea?