I'll try to write in english.

I've connected my HTC via WLAN to my Fritz!Box 7390, and the Philips 52PFL8605K is connected via LAN.
I've tried to open all ports (DMZ or Exposed Host) for my TV. Communication between Clients is allowed.
Net TV runs without any problems. But the App MyRemote for Android doesen't find the TV.
Smart TV (jointspace) is enabled. The IP Adresses are strictly given by the MAC ID's of the clients, every client constantly get's the same IP whenever it is conencted.
The latest TV and Router Firmware is installed.

I'm running out of ideas. Anyone could give me a helping hand or tip

so long, greetings from germany

p.s.: i hope my english isn't that bad^^