Quartek HD Rip80

I'm having trouble - as the manual's in French, and my French isn't good - in getting my player to recognise my MP3/4 player as a mass storage device.

I'm connecting my player to the Rip80 via the USB interface. I've downloaded a DivX AVI file to my MP3/4 player and am trying to play it through the Rip80.
When it reads the mass storage device, it appears to only recognise it as an MP3 player and only lists music files, even when the DivX file is in the MP3/4 players root directory.
Selecting the different icons at the bottom right-hand part of the screen doesn't help as I have only the music icon, the picture icon and a play icon displayed.

How can I get the Rip80 to recognise my DivX AVI file ?
I don't have this problem using a standard 2gig memory stick.

Any help appreciated.

Thanks,

John.