Netbook will only connect to Verizon WiFi, no other networks

I have a Gateway netbook with a Verizon data plan and, for some reason, my netbook will only connect to the internet via Verizon's network.  I am unable to get the netbook to connect to any other wifi network, including my home wireless network.  I can see other network connections that are available, but can't connect to them.  I'm sure there's probably some simple setting that I'm missing, so any advice or suggestions will be greatly appreciated.  Thanks in advance!