Is the box green showing connected ?.
If not, most likely you haven’t chosen the right comm, you can look under device manager, it’s there somewhere ( soz, I’m on my iPad ) the first thing you do is click comms, once your on the right one it will fire into life, your get the usual faults of car moved ect, just ignore, clear any faults and it should be ok
Otherwise give the obd socket a shot of cleaner, also check for bent pins in the lead, easy to do
Late 2000 4.6 vouge, 20" khans, running lpg. Exchange LR engine with low miles.
2.5 dse sold oct 2015
1997 green 4.6 vouge, sold Feb 2014
1997 blue 4.6 vouge, sold June 2013
1992 blue 3.9 classis, gave away 2010
1989 gold 3.5 classic, sold 2006
Etc etc missed out lots, on 14th Range Rover
Nano evo, Thor , dse, EAS kicker..