Can not operate GV's

[l386k]

I can not get the engines to start on any ground vehicles. When I attempt to start engines I get true engine sounds for about 5 seconds,then it changes to  a weird sound,and therefore no engine.

I have looked  at the software downloads but can't find the solution there! What is wrong with  my setup,I can operate the other craft ,boats,aircraft and etc.

[RTR]

Push the button ONCE, and ONCE only. Wait a few seconds. The GV engines take a little longer to start.

Q and W to shift gears.

Push your stick to move and steer.

RTR