Dear Tomasz,
Please see below
1. Most likely your images do not meet the requirements from MagiciNFO, should max 72 DPI and RGB color.
2. When you wish to do this you need to convert the device via the tab device>set in list view>tab set up>device conversion. After this, you need to push the specific W-Player software/ firmware to the screen
3. This can be done on-screen level, open the device edit menu in MagicINFO>Tab set up> see period
Kind regrads,
Pepijn.