I don't have Star Citizen, unfortunately. This is the first time I've heard of somebody NOT being able to use a mouse with SC (folks have been using VA with it for a long while now).
You do know you are pausing for a very long time (74+ seconds) - just thought I'd mention that (in case you're expecting the mouse to move immediately).
Have you tried creating a new command that just moves the mouse in SC via voice command (no keyboard hotkey, no pause)?
Have you tried moving the mouse with other apps just as a test?