I also have a similar problem. My tank stick controls (I am using their board in my cab, but not the actual tank stick). My esc key worked fine, but then I had a PC update, and now nothing. The esc key works in the emulators (to exit out of them), so it's not a PC/hardware issue. In big box though... Nothing. I had to change my back button. I have a keyboard hooked up as well, and it's not picking up that esc key either. The rest seem to work fine, from what I can tell.