D-Link DSL-2770L

I have problem to see serviio server and my new router.
With my old router i had no problems with both my tvs, a 42" lg and via lan and a 26" samsung via wifi.
With the new router I have a lot of problems.
The lg tv via lan don't recognize serviio at all, the samsung see serviio when I restart the pc and for about 24 hour.
If I reconnect the old router it works correctly.
There are a rule to set on router to make it works?
Thanks
With my old router i had no problems with both my tvs, a 42" lg and via lan and a 26" samsung via wifi.
With the new router I have a lot of problems.
The lg tv via lan don't recognize serviio at all, the samsung see serviio when I restart the pc and for about 24 hour.
If I reconnect the old router it works correctly.
There are a rule to set on router to make it works?
Thanks