i have a 2wire modem. i can connect my computer to it wireless using a wireless card. my ps3 is connected to it with an ethernet cable. the psp detects the modem 100%, but everytime it tries to obtain the ip adress, it times out. do i need to buy a wireless router? or is it possible to receive it from the modem? also, is it possible to connect the psp to the internet by connecting to the ps3?