Have you got any static IPs on your network or in any of those connections?
Also what happens if you bridge things, turn off the router for a while (to reset DHCP) and then turn the router back on?
static IP's? i think i ported foward one game. and how long should i turn my router off for?
edit:some how it worked. now i need my laptop with the DS emulator is wired to the wireless one. is the right thing to do?