1) What Software Version are you using.................?

2) Can you read the Vin Number by clicking Automatically Read Vin..................?

3) Click on Data Recordings and record the data log files and send it to Support Team and they will have a look where is the problem................

Hi, Maxisys Pro can support Range Rover P38 1998. Can you please advise your problem in more details? Or you may upload a data log for us to check this problem. Thanks and happy new year! 

 try switching the ign of then on just before you try to connect to an ecu these are trouble at the best of times..