The hud control will not show up in case you or your opponent has a router that has a too restrive NAT. More here: http://thelittleengineerthatcould.blogspot.ca/2014/08/routers-with-restrictive-nat-spoiling.html
The hud control will not show up in case you or your opponent has a router that has a too restrive NAT. More here: http://thelittleengineerthatcould.blogspot.ca/2014/08/routers-with-restrictive-nat-spoiling.html