missing tab and options in network connex properties

I set up a network with two xp home machines, but my
desktop doesn't see anything, from other posts I've read
I tried to check connection options in the local area
connection properties window, but there is no advanced
tab, (only general and authentication) and no install,
uninstall or properties buttons to use client for
microsoft networks, file and pring sharing, or tcp/ip. In
fact the center of the window is blank! How do I fix this?
Rob Shanahan