TvHeadend e IPTV

Hi guys,
I have some issues to config IPTV in TVH. After creating network, despite I can see all channels in muxes tab, the services tab is empty.
The url has this form:
http://v-iptv.xxxxxxxxxx.com:8000/get.ph...&output=ts
and so TVH doesn't works properly. It recognizes all muxes, but is not able to scan them, beacuse for each mux scanned status is always "bad".
Maybe, I need to find a way to allow TVH scanning.
Any suggestions?
Many thanks