Keep losing connection

I have a smart Samsung LCD tv we bought this year. I set up a serviio server with my iMac in my studio (in the desperate garage behind the house). I got it working, although it was lagging a bit... That's not why I'm here. It seems after a little while if not using it the serviio connection disappears from the "source" window on the tv. And so far the only way to get it back I could find was to completely reinstall serviio on the computer. I really don't want to do this 3 times a day.

Any ideas?