Now you should set up the port forwarding in your router. Use this guide for NetGear routers, e.g. Port 10009 should be forwarded to your ProfiLux's IP-address. So basically all requests from Internet with port 10009 will be forwarded to your ProfiLux.
Then you can try to access to your ProfiLux using your dns-address.
After that you can configure your app: set up the dyndns-address and the port you configured in router settings.