I was trying to do an inspection of a 1,000' radio tower using the Typhoon. Imagine my surprise when I hit 400' and it wouldn't go any higher (yes, I know there are legalities over that height, but it was a protected tower with lights and everything). I found I can adjust max-height by using the software and connecting to the Typhoon's data port. I hooked up the USB, reinstalled the drivers on my Windows laptop (and by all indications those are working okay), but there is no light showing communications through the USB plug, or the red indicator on the software. Any ideas of where to start to diagnose this problem? I need to change it.