Cannot assign modules to all Mobile Joomla Positions

Hello Guys,
I am trying to do the following thing - Mobile Joomla defines several positions

• mj_device_header
• mj_device_header1
• mj_all_header

etc. (same for middle and footer)

In my Joomla project different devices assigns the middle part (where the articles get displayed) to different positions (Middle for iPhone, footer for PDAs and Footer for WAP). I am trying to add Language selector and would love to add it to position mj_all_header. However when adding new component, this position is not available from the list.
What should I do?
Dint find any answer in FAQ nor in forum (Google included)

Joomla tries to help users by hiding positions from "unused" templates (and it considers mobile templates as "unused" because of they are not assigned to menu items).
But there is a solution: just type name of position in corresponding field instead of choosing it from dropdown list.

Thanks! That wouldnt come to my mind.