Can't open shop in hero siege

I don't know why but I can't open the shop in game I've tried with the controller pressing the x button but this doing nothing, after I play with the keyboard and this doing nothin when I press p ... The shop is unlock later in game maybe ? I am in act 2 in normal game.

EDIT

The solution if someone search for it:

http://steamcommunity.com/app/269210/discussions/0/613940477880546623/?tscn=1414947570