Ok, so basically, when ALL is well set, so in that moment in the source menu also the DLNA entry appears and, selecting it, you have it in the Media play (USB&DLNA) menu...
Definitively counter intuitive, but it works
so I got this new TV, and since I'm a technician (IT System integrator), I firstly upgraded the firmware to ver.T-CHL7DEUC-2001.0, then I started discovery the TV.
Well, 1st of all the instructions aren't so specific and clear: they're too generic, and not for THIS specific model.
2nd: the DLNA seems not available!
In the menu there's written "Media play (USB & DLNA)" but looks like only USB or internal TV memory is available!
The TV is regularly connected to my router which gives it the IP with DHCP internal server, the TV network test is fine, the Internet@TV works perfectly, the UPnP on the router (a D-Link) is ON, no firewall on my XP computer, Samsung PC Share manager (ver. 2.1) is on, foreground and sees the TV (and it's in acceptance policy)...
So, how can I see the DLNA and not always the USB or internal memory??