finally i can say : SOLVED!!!
i tell you how make futubox works if happend that in a future someone have my same issue :
serviio 1.0.1 under WINXP SP3 to a LG Smart TV 42LM670S
i don't think it's necessary to change the container from mpeg to mpegts as you say because i don't use applehttp links...by the way i leave it as mpegts
i follow your suggestion to use rtmp links and not applehttp links and this works!!! but the link must be coded in this way :
rtmp://s01.webport.tv:1935/live?lp=YOUR ... NEL.stream live=1
with this code i can see every futubox channels
really fluid (better than server pc browser) without buffering (i've not a standard config for internet...i have my server pc connected to internet with an ALFA AWUS036H (speedtest around 7mbit (here in italy is quite good i live in a little town...)) and the router linked to pc via lan , the router transmit to TV and other devices serviio.
the router is not connected directly to internet, i can't sharing the internet connection of the server pc because it must be linked on lan port of the router for serving serviio , if i link the PC to the internet port of the router and sharing the wifi connection i've internet on all devices...
and the router is an old (around 8 y.o.) belkin 54g paid like 30Euro (8 years ago) so i'm surprised about the stability and fluidity of the stream! the tv is around 10 meters and upstairs far away from router.
really good!!
i don't know how to thanks you for your help,time and patience
you give me a lot of hints really useful in a future!
thanks! great job!