I just bought a laptop for the first time. Hooked it up last night for wifi. Everything works great when I have my pc connected to my modem, but when I unplug it and try to use it with just the battery power, I can't get the internet up. I can only get the internet when the pc is plugged into the modem. I have my modem and router connected and everything tells me my wireless network is connected. What do I need to do to get my laptop to pull up the internet while using the battery instead of the ac adaptor?