It's probably been two years or so on this forum that we corresponded regarding the HDX900 and nanoflash.
It's been a long time since I read the forum, but in doing so today saw your post regarding the E-11 error. Fortunately I've never had that, and not wanting to hijack the thread, am re-posting with a question for you regarding use of the nano.
We've used the nano for nearly two years now on the 900 -- still love the pictures and ease of use.
We have never triggered the nano without tape in the camera however, and I recall you do that at least occasionally. Knowing the camera trigger won't control the nano -- we tried simply hitting 'record' on the nano but it doesn't activate.
How do you trigger the nano?