file sharing problem on XP

hi i cant see my own pc when i put an ip for my laptop 192.168.0.1 and try to
run \\
IP it says no network path found
the secondary problem is thru the linksys wireless router g
i seti it up on my desktop it assigns the desktop with 192.168.1.100 and the
rest startring off at 101 and on
the laptop finds the wireless network and connects to it
but when trying to run the desktop ip no network path found but from the
laptop i can run 192 168 1 1 whcich takes me into the web based router setup
before i used to be able to access the shared files and printers no w i cant