Need your help please answer!

I am playing mystery dungeon explorers of sky and I've beat darkrai but not collected the seven treasures...But I can not enter a wonder mail s via password!Each time I try one ,it says that the password is incorrect!What to do?(I have the europian version)

Thats only for Explorers of Darkness/Time. For Sky, you get them from Spinda's Cafe. (The Pokemon left of the entrance)