Disconnect / online sources

Hello guys,
I am using Serviio on the following setup:
PC (Win7) - router (TP-Link TL-WR2543ND) - TV (Samsung C550)
All connected by FTP cables
During watching a movies from local disc, there is no problem at all, but when I am trying to watch something from online sources (Top100.groovy - but others aswell), the session after few minutes disconnects ("Connection to server lost" - I am not sure about the exact phrase, because the TV has Czech menu).
I was trying to search this forum and yes, there are some similar topics, but none of them help me to make the videos work.
In attachemnet please find the detailed log.
I really appriciate any help.
I am using Serviio on the following setup:
PC (Win7) - router (TP-Link TL-WR2543ND) - TV (Samsung C550)
All connected by FTP cables
During watching a movies from local disc, there is no problem at all, but when I am trying to watch something from online sources (Top100.groovy - but others aswell), the session after few minutes disconnects ("Connection to server lost" - I am not sure about the exact phrase, because the TV has Czech menu).
I was trying to search this forum and yes, there are some similar topics, but none of them help me to make the videos work.
In attachemnet please find the detailed log.
I really appriciate any help.