I just bought a brand new 160GB PS3 and I am using the Dualshock 3 controller that comes with the system and when it is connected via USB to the PS3, the controller works perfectly but I also want to use it disconnected (since it is fully charged and the USB cable is really short). But when I use it disconnected, it starts to lag. At times, I will press a button and it will take a few seconds for the system to actually do it. Is this supposed to happen? What should I do?