OpenVPN for Android with MT question

We got the OpenVPN server up and running on a gateway router as described here - no issues to connect from a laptop client. But when trying to establish a connection with that android client it wont pass any LAN traffic - even thought the openvpn interface is bridged. Has anyone used this application yet and how to set it up correctly?

https://play.google.com/store/apps/details?id=de.blinkt.openvpn&hl=en

The config:

# Enables connection to GUI
management /data/data/de.blinkt.openvpn/cache/mgmtsocket unix
management-client
management-query-passwords
management-hold

# Log window is better readable this way
suppress-timestamps
client
verb 1
connect-retry-max 5
resolv-retry 5
dev tun
remote XX.XX.XX.XXX 1194 tcp-client
auth-user-pass
ca /mnt/sdcard/downloads/bluetooth/ca.crt
route 0.0.0.0  0.0.0.0
route 192.168.1.0  255.255.255.0