'Open In...' doesn't work with Infuse Pro or VLC?

Hi all

The interwebz says AC3 support was removed from the Sandisk app arsenal some time (not too long?) ago, but the workaround is to Open in Infuse…

So I bought an ixpand 3.0 recently, but when I try ‘Open In…’ (with any movie file), Infuse (and VLC) open as expected and the movie starts playing…for around 5 seconds every time. Then playback stops and goes back to the VLC/Infuse home screen.

I thought it might be an issue with space on my iPad, but the free space was almost double the size of the video file in most cases.

Any thoughts?