Yesterday my friend has a PSP 2000 and i got a 1001 we want to go multiplayer in Dragon Ball another Road we open the wlan then go to Network Battle option in the game then 1 - 3 seconds later my PSP will automatically turn off...we try it again but with the same result..i dont know why but his psp is not turning off automatically...next we try tekken my psp didnt shut down automatically but we cant see each other in the lobby... i didnt see his psp but i do know that he has 5.50 and i has 6.20 Pro-b10...