everything should be connected to the wireless router... any pcs/servers... etc...
from there, after you set up your wireless (in short you could just plug it all in to test, configure later) and connect your laptop to right wireless ssid, you should see the server.
servers should be set with a static ip, with that being said, make sure that your wireless router is handing out DHCP leases of the correct scope. i.e. if server is static configured with 192.168.0.* then the server should be set to hand out leases in the 192.168.0.* range... or change server, or if possible. configure routing table.
let me know if that helps.