System: Dell Desktop Windows 98 with Dell Truemobile Wireless Router. Has Ethernet card installed for Cable Modem.  Dell Laptop running Windows XP Pro has wireless network card installed.  Each machine can connect to the internet ok.  Problem:  Each machine recognizes itself on the Network but not the other.  Do I need to have a Desktop Wireless Card in addition to the Trubmobile 2300 Wireless Router to complete the Network so each machine can communicate with each other.  I'm frustrated and would really appreciate the help.  If I do need the Desktop Wireless Card, is there one available to plug into a USB port as I cannot install the card in the tower myself.