Re,
Bon, j'ai enfin trouvé la solution (trouvé sur un forum) :
I had similar problems but then I read that the wifi in the psp is 802.11b so if if your router is setup to only use G it won't work. Try that out it worked for me.
Modification effectuée sur mon routeur :
802.11g Only Mode : Disabled
Un succès !!!!
Cdlt.