Wireless printer can't connect to my network

I have Norton 360 running Windows 7.  I have an HP LaserJet p1102w printer.  It works fine connected via USB.  But when I try to connect wirelessly, it sees my SSID network name, but when I try to connect, the window to enter my WEP key does not pop up.  However, when I try to connect to my neighbor's networks, the window pops up immediately.  I have reinstalled the software repeatedly and disabled my firewall and antivirus autoprotect.  Any suggestions?  I'm thinking my firewall is blocking access somehow.