When you 'get' the box, all 4 spirits will already be in it, just they will not let you subdue them just like that. You will have to perform certain..actions to make them follow your commands. So, get the box, present it to Darion, and talk with the spirits (lower-left corner of the character screen, just click on their portraits). I think, you can 'use' the first two ASAP, but for the last two (Lina and the 'fat guy') you will need to progress through the game some more.
The first missions to unlock the first two spirits are easy enough, don't worry
p.s. hvala za 'legendo'